https://scholars.lib.ntu.edu.tw/handle/123456789/616366
標題: | Microstructural intra-granular cracking in Cu2ZnSnS4@C thin-film anode enhanced the electrochemical performance in lithium-ion battery applications | 作者: | Venugopal B. Shown I. Samireddi S. Syum Z. Krishnamoorthy V. Wu H.-L. Chu C.-W. Lee C.-H. Chen L.-C. Chen K.-H. LI-CHYONG CHEN |
公開日期: | 2021 | 卷: | 2 | 期: | 17 | 起(迄)頁: | 5672-5685 | 來源出版物: | Materials Advances | 摘要: | Cu2ZnSnS4 (CZTS) has demonstrated excellent performance as an anode material for lithium-ion batteries. However, the repeated lithiation and delithiation create a cracking pattern and lead to island formation in the thin-film electrode, resulting in a capacity fading over cycling in lithium-ion batteries (LIB's). In order to control this crack behaviour, we introduce carbon into CZTS thin-films by a hydrothermal method to form CZTS@C composite. CZTS@C significantly reduced the crack pattern formation on the electrode surface as well as improved the conductivity of the CZTS@C electrode. At the early stages of lithiation and delithiation, the volume expansion and contraction of Li-CZTS@C create intra-granular cracking only at the surface level, and it offers a high capacity of about 785 mA h g-1 after 150 cycles at 1000 mA g-1 charging rate, excellent rate capability (942 mA h g-1, 678 mA h g-1 and 435 mA h g-1 at 500 mA g-1, 2000 mA g-1 and 5000 mA g-1), and superior cyclability (925 mA h g-1 even after 200 cycles at 500 mA g-1). The excellent electrochemical performance at high-current rates can be attributed to intra-granular cracking together with carbon coating that provides a short transportation length for both lithium ions and electrons. Moreover, the controlled cracking pattern formation in CZTS@C facilitates faster reaction kinetics, which open up a new solution for the development of high-power thin-film anodes for next-generation LIBs applications. This journal is © The Royal Society of Chemistry. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85114240459&doi=10.1039%2fd1ma00471a&partnerID=40&md5=32248b6085081525070c026d344097a3 https://scholars.lib.ntu.edu.tw/handle/123456789/616366 |
ISSN: | 26335409 | DOI: | 10.1039/d1ma00471a |
顯示於: | 凝態科學研究中心 |
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