• 文献标题:   Thermal restacking of graphene structure to improve lithium-air battery cyclability
  • 文献类型:   Article
  • 作  者:   KIM J, CARLIN JM, SMITH SA, YIN J, JOO YL
  • 作者关键词:   lithium air, lithium oxygen, restacking, volume expansion, reduced graphene oxide, thermal treatment
  • 出版物名称:   ELECTROCHEMISTRY COMMUNICATIONS
  • ISSN:   1388-2481 EI 1873-1902
  • 通讯作者地址:   Cornell Univ
  • 被引频次:   1
  • DOI:   10.1016/j.elecom.2016.07.001
  • 出版年:   2016

▎ 摘  要

Poor rechargeability is one of major drawbacks of lithium-air batteries. Our study reveals that the accumulation and subsequent removal of reaction products during cycles can lead to a serious disruption and volume expansion of the cathode structure and demonstrates that by restacking and realigning the three phase interface of the cycled cathodes via mild heat treatment results in the enhanced cycle performance by over 200% and reduces the discharge overpotential at the same time. The results stress the importance of maintaining the physical configuration of lithium-air cathodes, and provide a new insight towards pulling out capacity retention of the system by better utilization of the available carbon surface. (C) 2016 Elsevier B.V. All rights reserved.