A Stretchable Graphitic Carbon/Si Anode Enabled by Conformal Coating of a Self-Healing Elastic Polymer

Yongming Sun; Jeffrey Lopez; Hyun-Wook Lee; Nian Liu; Guangyuan Zheng; Chun-Lan Wu; Jie Sun; Wei Liu; Jong Won Chung; Zhenan Bao; Yi Cui

doi:10.1002/adma.201504723

A Stretchable Graphitic Carbon/Si Anode Enabled by Conformal Coating of a Self-Healing Elastic Polymer

Adv Mater. 2016 Mar 23;28(12):2455-61. doi: 10.1002/adma.201504723. Epub 2016 Jan 27.

Authors

Yongming Sun¹, Jeffrey Lopez², Hyun-Wook Lee¹, Nian Liu¹, Guangyuan Zheng¹, Chun-Lan Wu¹, Jie Sun¹, Wei Liu¹, Jong Won Chung^{2

3}, Zhenan Bao², Yi Cui^{1

4}

Affiliations

¹ Department of Materials Science and Engineering, Stanford University, Stanford, CA, 94305, USA.
² Department of Chemical Engineering, Stanford University, Stanford, CA, 94305, USA.
³ Samsung Advanced Institute of Technology, Yeongtong-gu, Suwon-si, Gyeonggi-do, 443-803, South Korea.
⁴ Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA.

PMID: 26813780
DOI: 10.1002/adma.201504723

Abstract

A high-capacity stretchable graphitic carbon/Si foam electrode is enabled by a conformal self-healing elastic polymer coating. The composite electrode exhibits high stretchability (up to 88%) and endures 1000 stretching-releasing cycles at 25% strain with detrimental resistance increase. Meanwhile, the electrode delivers a high reversible specific capacity of 719 mA g(-1) and good cycling stability with 81% capacity retention after 100 cycles.

Keywords: carbon/Si stretchable electrodes; conformal coating; cycling performance; electrode materials; self-healing elastic polymers.