Latticed-Confined Conversion Chemistry of Battery Electrode

Fang, Libin, Li, Haosheng, Xu, Bin, Ma, Jie, Pan, Hongge, He, Qinggang, Zheng, Tianlong, Ni, Wenbin, Lin, Yue, Li, Yangmu, Cao, Yue, Sun, Chengjun, Yan, Mi, Sun, Wenping and Jiang, Yinzhu (2022) Latticed-Confined Conversion Chemistry of Battery Electrode. Small, 18 (48). p. 2204912. ISSN 1613-6810

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Electrochemical conversion reaction, usually featured by multiple redox processes and high specific capacity, holds great promise in developing high-energy rechargeable battery technologies. However, the complete structural change accompanies by spontaneous atomic migration and volume variation during the charge/discharge cycle leads to electrode disintegration and performance degradation, therefore severely restrict the application of conventional conversion-type electrodes. Herein, we propose latticed-confined conversion chemistry, where the “intercalation-like” redox behaviour is realized on the electrode with a “conversion-like” high capacity. By delicately formulating the high-entropy compounds, the pristine crystal structure can be preserved well by the inert lattice framework, thus enabling an ultra-high initial Coulombic efficiency of 92.5 and a long cycling lifespan over thousand cycles after quasistatic charge-discharge cycle. This lattice-confined conversion chemistry unfolds ubiquitous insights into the localized redox reaction and sheds new lights on developing high-performance electrodes toward next-generation high-energy rechargeable batteries.

Item Type: Article
Additional Information: Funding information: This work is supported by the National Key Research and Development Program (2019YFE0111200), the National Natural Science Foundation of China (51722105), the Natural Science Foundation of Zhejiang Province (LR18B030001), and the Fundamental Research Funds for the Central Universities (2021FZZX001-09). We thank the staff of beamline BL14B1/W1 at the Shanghai Synchrotron Radiation Facility for their support in in-situ synchrotron XRD measurements and parts of XAFS measurements. Collection of parts of the EXAFS data were supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Science and Engineering Division. Work at the Advanced Photon Source was supported by the U. S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357. Libin Fang# and Haosheng Li# contributed equally to this work.
Uncontrolled Keywords: lattice-confined conversion, high entropy, anode, stable cycle, high reversibility
Subjects: H300 Mechanical Engineering
H900 Others in Engineering
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Rachel Branson
Date Deposited: 30 Sep 2022 15:04
Last Modified: 20 Oct 2023 03:30

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