Affiliation:
1. Department of Electrical Engineering The Hong Kong Polytechnic University Hung Hom, Kowloon Hong Kong
2. Faculty of Science and Engineering The University of Manchester Manchester England United Kingdom
3. James Watt School of Engineering University of Glasgow Glasgow Scotland United Kingdom
Abstract
AbstractThe fast capacity degradation of silicon‐based anodes significantly limits the application in lithium‐ion battery (LIB) industries. Recently, Si−CuO composites have been reported as promising anodes in terms of being cost‐effective and technically feasible, but improved cycle stability is still desired. This work introduces a proper amount of NiO into the Si−CuO composites via a facile high‐energy ball‐milling method. The study reveals that compared to the binary Si‐CuO composites, Si−CuO−NiO samples have less pronounced volume change during the cycles due to the formation of rich‐Si NiSi2. More specifically, Si87.5(CuO)3.4(NiO)9.1 shows the highest 100‐cycle capacity retention of ∼86.9 % at 0.2 C with an average coulombic efficiency of ∼99.4 %. Moreover, the thermal stability investigation demonstrates that the temperature of 600 °C is suitable to coat a carbon layer on Si87.5(CuO)3.4(NiO)9.1, where the microstructure and the uniform element distribution produced in the milling process as well as the suppression to the cr‐Li3.75Si formation can be maintained to the maximum extent, thus with further enhanced electrochemical performance.
Funder
Hong Kong Polytechnic University
University of Glasgow
Subject
Electrochemistry,Electrical and Electronic Engineering,Energy Engineering and Power Technology
Cited by
3 articles.
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