• 文献标题:   Rhenium Diselenide Anchored on Reduced Graphene Oxide as Anode with Cyclic Stability for Potassium-Ion Battery
  • 文献类型:   Article
  • 作  者:   WU MG, YANG JL, NG DHL, MA JM
  • 作者关键词:   anode, composite, graphene, potassiumion batterie, rese2
  • 出版物名称:   PHYSICA STATUS SOLIDIRAPID RESEARCH LETTERS
  • ISSN:   1862-6254 EI 1862-6270
  • 通讯作者地址:   Hunan Univ
  • 被引频次:   9
  • DOI:   10.1002/pssr.201900329 EA AUG 2019
  • 出版年:   2019

▎ 摘  要

An effective route is developed to fabricate ultrathin rhenium diselenide (ReSe2) nanosheets anchored on reduced graphene oxide (rGO) nanoflakes (ReSe2@rGO). When the ReSe2@rGO is used as an anode material in the potassium-ion batteries (PIBs), the graphene offers a conductive matrix to buffer the volume alteration during repeated K+ insertion/extraction cycles. The stable interfacial connection between ReSe2 and graphene greatly promotes the integration of the active ReSe2 nanosheets, preventing their agglomeration. At the same time, these ultrathin nanosheets shorten the ion/electron diffusion path, leading to stable cyclic performance. As a result, the ReSe2@rGO anode enhances the electrochemical performance of the as-synthesized PIB with a high specific capacity of over 250 mAh g(-1) at a current density of 500 mA g(-1) even after 200 cycles. Excellent rate performance and lengthy cyclic performance with 150 mAh g(-1) at 2 A g(-1) are also observed even after 500 cycles.