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Zhao Y, Ma H, Huang S, et al. Monolayer Nickel Cobalt Hydroxyl Carbonate for High Performance All-Solid-State Asymmetric Supercapacitors. ACS Appl Mater Interfaces. 2016;8(35):22997-3005doi: 10.1021/acsami.6b05496.
Zhao, Y., Ma, H., Huang, S., Zhang, X., Xia, M., Tang, Y., & Ma, Z. F. (2016). Monolayer Nickel Cobalt Hydroxyl Carbonate for High Performance All-Solid-State Asymmetric Supercapacitors. ACS applied materials & interfaces, 8(35), 22997-3005. https://doi.org/10.1021/acsami.6b05496
Zhao, Yufeng, et al. "Monolayer Nickel Cobalt Hydroxyl Carbonate for High Performance All-Solid-State Asymmetric Supercapacitors." ACS applied materials & interfaces vol. 8,35 (2016): 22997-3005. doi: https://doi.org/10.1021/acsami.6b05496
Zhao Y, Ma H, Huang S, Zhang X, Xia M, Tang Y, Ma ZF. Monolayer Nickel Cobalt Hydroxyl Carbonate for High Performance All-Solid-State Asymmetric Supercapacitors. ACS Appl Mater Interfaces. 2016 Sep 07;8(35):22997-3005. doi: 10.1021/acsami.6b05496. Epub 2016 Aug 29. PMID: 27525445.
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ACS Appl Mater Interfaces. 2016 Sep 07;8(35):22997-3005. doi: 10.1021/acsami.6b05496. Epub 2016 Aug 29.

Monolayer Nickel Cobalt Hydroxyl Carbonate for High Performance All-Solid-State Asymmetric Supercapacitors.

ACS applied materials & interfaces

Yufeng Zhao, Hongnan Ma, Shifei Huang, Xuejiao Zhang, Meirong Xia, Yongfu Tang, Zi-Feng Ma

Affiliations

  1. Key Laboratory of Applied Chemistry, Yanshan University , Qinhuangdao 066004, China.
  2. Shanghai Electrochemical Energy Devices Research Center, Department of Chemical and Engineering, Shanghai Jiao tong University , Shanghai 200240, China.

PMID: 27525445 DOI: 10.1021/acsami.6b05496

Abstract

The emergence of atomically thick nanolayer materials, which feature a short ion diffusion channel and provide more exposed atoms in the electrochemical reactions, offers a promising occasion to optimize the performance of supercapacitors on the atomic level. In this work, a novel monolayer Ni-Co hydroxyl carbonate with an average thickness of 1.07 nm is synthesized via an ordinary one-pot hydrothermal route for the first time. This unique monolayer structure can efficiently rise up the exposed electroactive sites and facilitate the surface dependent electrochemical reaction processes, and thus results in outstanding specific capacitance of 2266 F g(-1). Based on this material, an all-solid-state asymmetric supercapacitor is developed adopting alkaline PVA (poly(vinyl alcohol)) gel (PVA/KOH) as electrolyte, which performs remarkable cycling stability (no capacitance fade after 19 000 cycles) together with promising energy density of 50 Wh kg(-1) (202 μWh cm(-2)) and high power density of 8.69 kW kg(-1) (35.1 mW cm(-2)). This as-assembled all-solid-state asymmetric supercapacitor (AASC) holds great potential in the field of portable energy storage devices.

Keywords: Ni−Co hydroxyl carbonate; cycling stability; monolayer; solid-state; supercapacitor

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