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A graphene-modified flexible SiOC ceramic cloth for high-performance lithium storage
时间:2023-02-24 15:32:04
作品信息

期刊

Energy Storage Materials

标题

A graphene-modified flexible SiOC ceramic cloth for high-performance lithium storage

作者

Zhiyuan Sang, Xiao Yan, Lei Wen, Dong Su, Zhihao Zhao, Yue Liu, Huiming Ji, Ji Liang, Shi Xue Dou

摘要

The rapid development of portable and wearable electronics requires novel flexible energy storage devices with high energy and power densities. Nevertheless, the fabrication of high-performance flexible electrodes for achieving this goal remains challenging. We herein report a large-area and highly-flexible polymer-derived silicon oxycarbide ceramic (SiOC) fibers cloth modified by quasi three-dimensional graphene framework (3D-GNS/SiOCf) as a flexible anode for lithium ion batteries (LIBs). The SiOC fibers have a hierarchical porous structure and a rough surface to facilitate the insertion/extraction of Li+ ions, while the GNS framework provides a conductive network by bridging the adjacent SiOC fibers and coating the individual SiOC fibers to significantly enhance electron transfer and robust electrochemical Li+ ion storage. Therefore, this 3D-GNS/SiOCf material exhibits a high reversible capacity (924 mAh g-1 at 0.1 A g-1), good rate performance (330 mAh g-1 at 2.0 A g-1), and excellent cycling stability (686 mAh g-1 at 0.5 A g-1 after 500 cycles). A prototype flexible LIB full cell assembled using this anode with LiFePO4 cathode exhibits good performance through a series of bending tests. Consequently, the resultant 3D-GNS/SiOCf anode has great potential for flexible energy storage and sheds light on the design of other flexible devices.

原文链接

https://www.sciencedirect.com/science/article/abs/pii/S2405829719310499

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