4.7 Article

One-step synthesis of 2D vertically-aligned hybrid CuSe@NiSe nanosheets for high performance flexible supercapacitors

期刊

JOURNAL OF ALLOYS AND COMPOUNDS
卷 892, 期 -, 页码 -

出版社

ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2021.162159

关键词

Two-dimensional materials; CuSe@NiSe; Hydrothermal synthesis; Flexible-supercapacitor; Electro-chemical properties

资金

  1. Opening Project of Key Laboratory of Microelectronic Devices & Integrated Technology, Institute of Microelectronics, Chinese Academy of Sciences
  2. Strategic Priority Research Program of the Chinese Academy of Sciences (Category B) [XDB44000000-6]
  3. Science and Technology Research Project in Henan Province [192102110088]
  4. Technology Innovation Foundation of Henan Agricultural University [KJCX2018C03]

向作者/读者索取更多资源

A novel method has been applied to prepare CuSe@NiSe nanosheets with excellent electrochemical and cycling performance on the surface of copper foam. The solid-state flexible capacitors made with this material demonstrate outstanding performance and cycle stability.
An in-situ one-step hydrothermal method is used to prepare hybrid CuSe@NiSe nanosheets with vertical orientation and interpenetrating structure on the surface of copper foam (S-CuSe@NiSe). The S-CuSe@NiSe has excellent electrochemical performance and outstanding cycling performance. The specific capacitance of the S-CuSe@NiSe is 1478 F g(-1) at a current density of 1 A g(-1) and stabilizes at 990 F g(-1) at 8 A g(-1). The specific capacitance retention of S-CuSe@NiSe is 81.7% after 10,000 cycles. The all-solid-state flexible capacitors prepared with S-CuSe@NiSe as electrode (S-CuSe@NiSe-SFCs) also exhibit excellent flexibility, superior electrochemical performance and cycle stability. Its capacitance reaches 333 F g(-1) at a current density of 1 A g(-1). Capacitance retention of 79.3% has been obtained after 10,000 charge-discharge cycles at 2 A g(-1). (C) 2021 Elsevier B.V. All rights reserved.

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