Now showing 1 - 10 of 69
  • Publication
    Metadata only
    Imidazole‐intercalated cobalt hydroxide enabling the li+ desolvation/diffusion reaction and flame retardant catalytic dynamics for lithium ion batteries
    (Wiley, 2024)
    Yang, Liu
    ;
    Wang, Yisha
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    Wang, Jingwen
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    Zheng, Yapeng
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    Hu, Yuan
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    Zhu, Jixin
    Lithium-ion batteries have found extensive applications due to their high energy density and low self-discharge rates, spanning from compact consumer electronics to large-scale energy storage facilities. Despite their widespread use, challenges such as inherent capacity degradation and the potential for thermal runaway hinder sustainable development. In this study, we introduce a unique approach to synthesize anode materials for lithium-ion batteries, specifically imidazole-intercalated cobalt hydroxide. This innovative material significantly enhances the Li+ desolvation/diffusion reaction and flame-retardant dynamics through complexing and catalytic synergetic effects. The lithium-ion batteries incorporating these materials demonstrate exceptional performance, boasting an impressive capacity retention of 997.91 mAh g-1 after 500 cycles. This achievement can be attributed to the optimization of the solid electrolyte interphase (SEI) interface engineering, effectively mitigating anode degradation and minimizing electrolyte consumption. Experimental and theoretical calculations validate these improvements. Importantly, imidazole intercalated Co(OH)2 (MI- Co(OH)2) exhibits a remarkable catalytic effect on electrolyte carbonization and the conversion of CO to CO2. This dual action suppresses smoke and reduces toxicity significantly. The presented work introduces a novel approach to realizing high-performance and safe lithium-ion batteries, addressing key challenges in the pursuit of sustainable energy solutions.
  • Publication
    Metadata only
    Revolutionary MOF-enhanced anion exchange membrane for precise monovalent anion separation through structural optimization and doping
    (Elsevier, 2024)
    Li, Junhua
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    Xu, Zhipeng
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    Liao, Junbin
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    Chen, Xuanhua
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    Mu, Junjie
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    Shen, Jiangnan
    Ion selective separations play crucial roles in the fields of energy storage, pollution management, and industrial processes, etc. Ion exchange membranes (IEMs) offer promise for these separations but often lacking the required selectivity. In this work, we have developed a kind of IEM based on metal-organic frameworks (MOFs) to enhance membrane separation performance for electrodialysis (ED). Specifically, for poly(arylene ether sulfone)-based anion exchange membranes (AEMs), we introduced the modified MOFs through doping to create a transport pathway for target ions, leveraging their precise size-based separation effects. This approach significantly improves ion selectivity. Remarkably, at a current density of 2.5 mA·cm−2, the monovalent ion selectivity (Cl−/SO42−) of PAES-UIO-66-Pyr could reach 54.26, while the monovalent ion selectivity (NO3/SO42−) could reach 55.90. These enhancements may stem from the incorporation of MOF particles, which facilitate the formation of fixed-size channel structures within membrane matrix. These fixed-size channels, coupled with the hydrophobic differences between the original poly(arylene ether sulfone) polymer, created a composite channel system that significantly improved the separation performance for monovalent ions, including Cl−/SO42− and NO3/SO42−.
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  • Publication
    Metadata only
    Dual carbon-confined Sb2Se3 nanoparticles with pseudocapacitive properties for high-performance lithium-ion half/full batteries
    (2021)
    Han, Xu
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    Zhou, Chengyan
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    Zhu, Fengyaun
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    Zhang, Xiaoli
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    Geng, Hongbo
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    Cao, Xueqin
    ;
    Zheng, Junyue
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    Gu, Hongwei
    Transition metal selenides have attracted enormous research attention as anodes for lithium-ion batteries (LIBs) due to their high theoretical specific capacities. Nevertheless, the low electronic conductivity and dramatic volume variation in electrochemical reaction processes result in rapid capacity fading and poor rate capability. Herein, a metal–organic framework is used as a template to in situ synthesize Sb2Se3 nanoparticles encapsulated in N-doped carbon nanotubes (N-CNTs) grafted on reduced graphene oxide (rGO) nanosheets. The synergistic effects of N-doped carbon nanotubes and reduced graphene oxide nanosheets are beneficial for providing good electrical conductivity and maintaining the structural stability of electrode materials, leading to stable cycling performance and superior rate performance. Kinetic analysis suggests that the electrochemical reaction kinetics is dominated by pseudocapacitive contribution. Notably, a high discharge capacity of 451.1 mA h g−1 at a current density of 2.0 A g−1 is delivered after 450 cycles. Even at a high current density of 10.0 A g−1, a discharge capacity of 192.6 mA h g−1 is maintained after 10 000 cycles. When coupled with a commercial LiFePO4 cathode, the full batteries show an excellent discharge specific capacity of 534.5 mA h g−1 at 0.2 A g−1. This work provides an effective strategy for constructing high-performance anodes for Li+ storage.
    WOS© Citations 10  61
  • Publication
    Metadata only
    Intrinsic ionic confinement dynamic engineering of ionomers with low dielectric-k, high healing and stretchability for electronic device reconfiguration
    (2023)
    Wang, Jingwen
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    Zheng, Yapeng
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    Ren, Wei
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    Song, Lei
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    Zhu, Jixin
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    Hu, Yuan
    Ionomers are gaining much attention in the fields of soft robots, flexible electronics, and artificial intelligence. However, intrinsic dynamics modulation of ionomer molecules to achieve desirable properties is highly required and challenging due to a lack of understanding of the interactions between polymerics and ionic species. In this study, a novel ionic confinement engineering approach was employed, in which the composition of a copolymer, namely, PTAE-Fe, was adjusted to facilitate dynamic ionic crosslinking, which enables high stretchability (>10000 % elongation). The proportion of ionic functional groups in PTAE-Fe significantly enhanced the self-healing efficiency up to 95 %. The ionic confinement strategy also promotes electron momentum locking, resulting in a low dielectric-k property (Dk < 2.5), while a reduction in the heat release rate of 69.1 % makes the ionomer an excellent flame retardant material. In addition, a eutectic gallium-indium (EGaIn)-infused stretchable device and low Dk flexible ink were designed according to the ionic confinement strategy. The as-fabricated ionomer is expected to benefit a wide range of energy and storage technologies.
    WOS© Citations 13Scopus© Citations 17  58
  • Publication
    Open Access
    Recent advances of transition metal based bifunctional electrocatalysts for rechargeable zinc-air batteries
    (2020)
    Wei, Licheng
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    ; ;
    Qin, Yanlin
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    Zhang, Yufei
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    Ye, Minghui
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    Liu, Qi
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    Li, Cheng Chao
    Due to high energy density, abundant resource and eco-friendly efficiency, rechargeable zinc air batteries (ZABs) have been recognized as promising alternative energy storage systems for conventional lithium-ion batteries for powering vehicles. However, the sluggish reaction kinetics of oxygen reduction and oxygen evolution on the air electrodes of ZABs require to developing cost-effective and high-efficiency bifunctional electrocatalysts for commercialization ZABs. Currently, transition metal-based materials have been explored as potential bifunctional electrocatalysts for ZABs with the advantages of highly activity, cost-effective and excellent stability. Therefore, this review intends to give a comprehensive overview on developments of transition metal-based catalysts (TMCAs) in most recently. According to different constitutions of TMCAs, catalysts of single atom, nanoalloys, oxides, hydroxides, chalcogenides, nitrides and phosphides are systematically introduced in the review. The structural modulations of TMCAs via nanosizing, heteroatom doping and their interface effect are also discussed since they play vital roles in exposing sufficient intrinsic active sites for enhancing the catalytic performance. Finally, the existing challenges of TMCAs and feasible strategies for enhancing the bifunctional catalytic performance and promoting the performance of ZABs are also explored detailly. Based on this review, we hope to provide reference values for building effective bifunctional electrocatalysts for commercial rechargeable ZABs.
    WOS© Citations 55Scopus© Citations 61  104  96
  • Publication
    Embargo
    Cu-doped oxygen-rich vacancy mofs derived perovskite for enhanced mineralization of refractory organics through synergistic non-radical species effects
    (Elsevier, 2024)
    Guan, Yu
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    Zhou, Guolang
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    Li, Lin
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    Jiang, Yexin
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    Yin, Jingzhou
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    Liu, Cheng
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    Zhang, Lili
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    Han, Qiaofeng
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    This research focused on creating oxygen vacancy-enriched copper-doped LaFeO3 perovskite using a Prussian blue MOF template. This new material, LFO-Cu, showed outstanding Bisphenol A (BPA) degradation with 98 % efficiency in just 30 min, ten times faster than pure LaFeO3 (LFO). Moreover, the LFO-Cu/peroxymonosulfate (PMS) system worked effectively at pH levels from 4 to 10, breaking down various pollutants (TC, PhOH, MV, MB), and removing 85 % TOC in BPA and 50 % in TC. Density Functional Theory (DFT) calculations revealed that copper strengthened the catalyst-PMS interaction, leading to the generation of highly reactive oxygen species (ROS), primarily singlet oxygen (1O2) and superoxide radicals (O2–·). A degradation pathway was proposed, showing less toxic intermediates than BPA. In summary, copper-doped oxygen-rich vacancy MOFs-derived perovskite has significant potential for improving refractory organic mineralization.
    Scopus© Citations 2  12  33
  • Publication
    Metadata only
    Structural regulation of coal-derived hard carbon anode for sodium-ion batteries via pre-oxidation
    (Springer, 2024)
    Su, Meng-Yuan
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    Zhang, Kai-Yang
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    Zhang, Xue-Li
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    Liu, Yan-Ning
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    Yang, Jia-Lin
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    Gu, Zhen-Yi
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    Butt, Faaz A.
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    Wu, Xing-Long
    Hard carbon (HC) is broadly recognized as an exceptionally prospective candidate for the anodes of sodium-ion batteries (SIBs), but their practical implementation faces substantial limitations linked to precursor factors, such as reduced carbon yield and increased cost. Herein, a cost-effective approach is proposed to prepare a coal-derived HC anode with simple pre-oxidation followed by a post-carbonization process which effectively expands the d002 layer spacing, generates closed pores and increases defect sites. Through these modifications, the resulting HC anode attains a delicate equilibrium between plateau capacity and sloping capacity, showcasing a remarkable reversible capacity of 306.3 mAh·g−1 at 0.03 A·g−1. Furthermore, the produced HC exhibits fast reaction kinetics and exceptional rate performance, achieving a capacity of 289 mAh·g−1 at 0.1 A·g−1, equivalent to ~ 94.5% of that at 0.03 A·g−1. When implemented in a full cell configuration, the impressive electrochemical performance is evident, with a notable energy density of 410.6 Wh·kg−1 (based on cathode mass). In short, we provide a straightforward yet efficient method for regulating coal-derived HC, which is crucial for the widespread use of SIBs anodes.
  • Publication
    Metadata only
    Advancing lithium–magnesium separation: Pioneering swelling-embedded cation exchange membranes based on sulfonated poly(ether ether ketone)
    (American Chemical Society, 2024)
    Qian, Hao
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    Xu, Geting
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    Yang, Shanshan
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    Chen, Quan
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    Lin, Chenfei
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    Liao, Junbin
    ;
    Shen, Jiangnan
    With the continuous advancement of electrodialysis (ED) technology, there arises a demand for improved monovalent cation exchange membranes (CEMs). However, limitations in membrane materials and structures have resulted in the low selectivity of monovalent CEMs, posing challenges in the separation of Li+ and Mg2+. In this investigation, a designed CEM with a swelling-embedded structure was created by integrating a polyelectrolyte containing N-oxide Zwitterion into a sulfonated poly(ether ether ketone) (SPEEK) membrane, leveraging the notable solubility characteristic of SPEEK. The membranes were prepared by using N-oxide zwitterionic polyethylenimine (ZPEI) and 1,3,5-benzenetrlcarbonyl trichloride (TMC). The as-prepared membranes underwent systematic characterization and testing, evaluating their structural, physicochemical, electrochemical, and selective ED properties. During ED, the modified membranes demonstrated notable permeability selectivity for Li+ ions in binary (Li+/Mg2+) systems. Notably, at a constant current density of 2.5 mA cm–2, the modified membrane PEI-TMC/SPEEK exhibited significant permeability selectivity (PLi+Mg2+=5.63) in the Li+/Mg2+ system, while ZPEI-TMC/SPEEK outperformed, displaying remarkable permeability selectivity (PLi+Mg2+=12.43) in the Li+/Mg2+ system, surpassing commercial monovalent cation-selective membrane commercial monovalent cation-selective membrane (CIMS). Furthermore, in the Li+/Mg2+ binary system, Li+ flux reached 9.78 × 10–9 mol cm–2 s–1 for ZPEI-TMC/SPEEK, while its Mg2+ flux only reached 2.7 × 10–9 mol cm–2 s–1, showing potential for lithium–magnesium separation. In addition, ZPEI-TMC/SPEEK was tested for performance and stability at high current densities. This work offers a straightforward preparation process and an innovative structural approach, presenting methodological insights for the advancement of lithium and magnesium separation techniques.
  • Publication
    Metadata only
    Modulating the kinetics of CoSe2 yolk-shell spheres via nitrogen doping with high pseudocapacitance toward ultra-high-rate and high-energy density sodium-ion half/full batteries
    (2021)
    Geng, Jitao
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    Zhang, Shiyu
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    Guo, Jia
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    Jin, Zhihua
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    Li, Xiao
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    Cheng, Yafei
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    Dong, Huilong
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    Geng, Hongbo
    Developing advanced anode materials with high capacity, and good rate and cycling performance for sodium-ion batteries still remains a major challenge at the moment. Herein, it is demonstrated that the introduction of nitrogen elements into CoSe2 yolk–shell spheres (N-CoSe2 yss) with rapid electrochemical kinetics contributes to excellent sodium storage performance. Specifically, the N-CoSe2 yss deliver a high capacity of 431 mA h g−1 at a high current density of 50 A g−1 and a high reversible capacity of 500 mA h g−1 after 1000 cycles at 10 A g−1 with nearly 100% coulombic efficiency. Experimental and density functional theory calculation results indicate that the superior electrochemical performance can be attributed to the synergistic effect of nitrogen doping and structure engineering, which can not only enhance the electronic/ion transport kinetics, but also improve the structural stability during cycling. When coupled with a high-voltage cathode, the full cell shows a high energy density of 129.38 W h kg−1 at a power density of 187.5 W kg−1, confirming the potential applications of N-CoSe2 yss in high-performance sodium-ion batteries.
    WOS© Citations 9Scopus© Citations 10  55
  • Publication
    Embargo
    Enhancing reductive C-N coupling of nitrocompounds through interfacial engineering of MoO2 in thin carbon layers
    (Royal Society of Chemistry, 2023)
    Liu, Mengting
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    Dong, Xuexue
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    Zhong, Xiu
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    Wang, Zhenxiao
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    Gong, Juanjuan
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    Song, Heng
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    Yu, Chao
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    Yuan, Aihua
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    Yang, Fu
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    In this study, we developed an approach by coating silica nanospheres with polydopamine and metal precursor, followed by carbonization to create interfacial engineered MoO2. The presence of numerous crystal interfaces and metal–carbon interactions resulted in a remarkable enhancement of C–N coupling activity and stability of catalyst compared to one obtained by air calcination.
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