Journal
BATTERIES & SUPERCAPS
Volume 1, Issue 3, Pages 122-128Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/batt.201800047
Keywords
crack-healing; liquid metal; lithium-ion batteries; materials science; silicon
Funding
- Science and Engineering Faculty (QUT)
- QUT
- ARC [DP150101717, DP180102003]
Ask authors/readers for more resources
Silicon has attracted attention as one of the most promising anode materials for future generation energy storage devices, owing to its high theoretical specific capacity. However, its use has been impeded by significant volume expansion during electrochemical lithiation. In this work we utilise liquid galinstan (68.5% Ga, 21.5% In and 10% Sn) to repair the cracking caused by volume expansion in Si thin film and Si composite electrodes. A bridging mechanism is observed, through which the electrical conductivity can be significantly improved. The composite electrode delivers an initial capacity of 2697 mAh g(-1) and reaches a coulombic efficiency similar to 100% after 140 cycles. In addition, nanoindentation tests show that a better mechanical behavior is achieved with increased flexibility. We believe that these results may provide a way to prepare mechanically robust high capacity electrodes.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available