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Vertically Oriented and Interpenetrating CuSe Nanosheet Films with Open Channels for Flexible All-Solid-State Supercapacitors

Journal Article · · ACS Omega
 [1];  [1];  [2];  [1];  [3];  [4];  [4];  [5];  [1];  [2]
  1. Hohai Univ., Nanjing (China)
  2. Nanjing Normal Univ. (China)
  3. Nanjing Normal Univ. (China); Nanjing Univ. (China)
  4. Nanjing Univ. (China)
  5. Ames Lab., Ames, IA (United States)

As a p-type multifunctional semiconductor, CuSe nanostructures show great promise in optoelectronic, sensing, and photocatalytic fields. Although great progress has been achieved, controllable synthesis of CuSe nanosheets (NSs) with a desirable spacial orientation and open frameworks remains a challenge, and their use in supercapacitors (SCs) has not been explored. Herein, a highly vertically oriented and interpenetrating CuSe NS film with open channels is deposited on an Au-coated polyethylene terephthalate substrate. Such CuSe NS films exhibit high specific capacitance (209 F g–1) and can be used as a carbon black- and binder-free electrode to construct flexible, symmetric all-solid-state SCs, using polyvinyl alcohol–LiCl gel as the solid electrolyte. A device fabricated with such CuSe NS films exhibits high volumetric specific capacitance (30.17 mF cm–3), good cycling stability, excellent flexibility, and desirable mechanical stability. The excellent performance of such devices results from the vertically oriented and interpenetrating configuration of CuSe NS building blocks, which can increase the available surface and facilitate the diffusion of electrolyte ions. Moreover, as a prototype for application, three such solid devices in series can be used to light up a red light-emitting diode.

Research Organization:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-07CH11358
OSTI ID:
1368042
Report Number(s):
IS--J-9285
Journal Information:
ACS Omega, Journal Name: ACS Omega Journal Issue: 3 Vol. 2; ISSN 2470-1343
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (4)

Recent Advances in Metal Chalcogenides (MX; X = S, Se) Nanostructures for Electrochemical Supercapacitor Applications: A Brief Review journal April 2018
Evaporation‐Induced Vertical Alignment Enabling Directional Ion Transport in a 2D‐Nanosheet‐Based Battery Electrode journal January 2020
Towards flexible solid-state supercapacitors for smart and wearable electronics journal January 2018
Synthesis of a 3D free standing crystalline NiSe x matrix for electrochemical energy storage applications journal January 2019

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