期刊
CHEMICAL ENGINEERING JOURNAL
卷 465, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2023.142786
关键词
Lithium-ion battery; Conductive support; polyaniline (PANI) modify CZTS; In-situ Raman; Ex-situ XAS
"This study reports high-performance and stable Cu2ZnSnS4 (CZTS) anode materials encapsulated by nitrogen-doped carbon (CZTS@N-C) for advanced lithium-ion battery applications. The nitrogen-doped carbon network improves the solid-electrolyte interphase, resulting in lower charge-transfer resistance and faster Li+ diffusion kinetics. The CZTS@N-C electrode demonstrates a significantly enhanced capacity of 710 mAh g+1 with 73% capacity retention after 220 cycles and superior rate performance."
Achieving lithium-ion batteries with both excellent electrochemical performance and cycling stability is a top priority for their real-world applications. This work reports high-performance and stable Cu2ZnSnS4 (CZTS) anode materials encapsulated by nitrogen-doped carbon (CZTS@N-C) for advanced lithium-ion battery appli-cation. Ex-situ X-ray photoelectron spectroscopy and transmission electron microscopy revealed that the nitrogen-doped carbon network features a more conducive solid-electrolyte interphase that enables lower charge-transfer resistance and fast Li+ diffusion kinetics with negligible initial irreversible capacity loss. As a result, the CZTS@N-C electrode delivers a significantly enhanced capacity of 710 mAh g+1 with 73% capacity retention after 220 cycles at a current rate of 0.5 mA g+1 and superior rate performance compared to that of unmodified CZTS. Additionally, the study sheds light on the fast lithiation dynamics chemistry of CZTS@N-C through kinetics analysis, explored by in-situ Raman, ex-situ X-ray absorption, and in-situ electrochemical impedance. This study provides a new approach for fabricating high-performance, durable conductive polymer -encapsulated low-cost transition-metal-sulfide anode materials.
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