Effects of Anion Carriers on Capacitance and Self-Discharge Behaviors of Zinc Ion Capacitors

Zhaodong HUANG; Tairan WANG; Hao SONG; Xinliang LI; Guojin LIANG; Donghong WANG; Qi YANG; Ze CHEN; Longtao MA; Zhuoxin LIU; Biao GAO; Jun FAN; Chunyi ZHI

doi:10.1002/anie.202012202

Effects of Anion Carriers on Capacitance and Self-Discharge Behaviors of Zinc Ion Capacitors

Zhaodong HUANG, Tairan WANG, Hao SONG, Xinliang LI, Guojin LIANG, Donghong WANG, Qi YANG, Ze CHEN, Longtao MA, Zhuoxin LIU, Biao GAO^*, Jun FAN^*, Chunyi ZHI^*

^*Corresponding author for this work

Research output: Journal Publications › Journal Article (refereed) › peer-review

154 Citations (Scopus)

Abstract

Pseudocapacitive behavior and ion hybrid capacitors can improve the energy density of supercapacitors, but research has only considered the reaction of cations during the electrochemical process, leading to a flawed mechanistic understanding. Here, the effects of various anions carriers on the electrochemical behaviors of titanium nitride-based zinc ion capacitor (Zn-TiN capacitor) were explored. DFT calculations revealed the stable structure of TiN-SO₄ after adsorbed process, enabling SO₄²⁻ participate in the electrochemical process and construct a two-step adsorption and intercalation energy storage mechanism, improving the capacitance and anti-self-discharge ability of the Zn-TiN capacitor, which delivered an ultrahigh capacitance of 489.8 F g⁻¹ and retained 83.92 % of capacitance even after 500 h resting time. An energy storage system involving anions in the electrochemical process can improve capacitance and anti-self-discharge ability of ion hybrid capacitors.

Original language	English
Pages (from-to)	1011-1021
Number of pages	11
Journal	Angewandte Chemie - International Edition
Volume	60
Issue number	2
Early online date	23 Sept 2020
DOIs	https://doi.org/10.1002/anie.202012202
Publication status	Published - 11 Jan 2021
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2020 Wiley-VCH GmbH

Funding

This research was supported by GRF under Project N_CityU11305218. The work was also partially sponsored by National Natural Science Foundation of China (No. 51974208), Natural Science Funds of Hubei Province for Distinguished Young Scholar (2020CFA099), Hubei Province Natural Science Foundation Innovation Group Project (2019CFA020).

Keywords

anions
anti-self-discharge
titanium nitride
zinc ion capacitors

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10.1002/anie.202012202

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abstract = "Pseudocapacitive behavior and ion hybrid capacitors can improve the energy density of supercapacitors, but research has only considered the reaction of cations during the electrochemical process, leading to a flawed mechanistic understanding. Here, the effects of various anions carriers on the electrochemical behaviors of titanium nitride-based zinc ion capacitor (Zn-TiN capacitor) were explored. DFT calculations revealed the stable structure of TiN-SO4 after adsorbed process, enabling SO42− participate in the electrochemical process and construct a two-step adsorption and intercalation energy storage mechanism, improving the capacitance and anti-self-discharge ability of the Zn-TiN capacitor, which delivered an ultrahigh capacitance of 489.8 F g−1 and retained 83.92 % of capacitance even after 500 h resting time. An energy storage system involving anions in the electrochemical process can improve capacitance and anti-self-discharge ability of ion hybrid capacitors.",

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AU - HUANG, Zhaodong

AU - WANG, Tairan

AU - SONG, Hao

AU - LI, Xinliang

AU - LIANG, Guojin

AU - WANG, Donghong

AU - YANG, Qi

AU - CHEN, Ze

AU - MA, Longtao

AU - LIU, Zhuoxin

AU - GAO, Biao

AU - FAN, Jun

AU - ZHI, Chunyi

PY - 2021/1/11

Y1 - 2021/1/11

N2 - Pseudocapacitive behavior and ion hybrid capacitors can improve the energy density of supercapacitors, but research has only considered the reaction of cations during the electrochemical process, leading to a flawed mechanistic understanding. Here, the effects of various anions carriers on the electrochemical behaviors of titanium nitride-based zinc ion capacitor (Zn-TiN capacitor) were explored. DFT calculations revealed the stable structure of TiN-SO4 after adsorbed process, enabling SO42− participate in the electrochemical process and construct a two-step adsorption and intercalation energy storage mechanism, improving the capacitance and anti-self-discharge ability of the Zn-TiN capacitor, which delivered an ultrahigh capacitance of 489.8 F g−1 and retained 83.92 % of capacitance even after 500 h resting time. An energy storage system involving anions in the electrochemical process can improve capacitance and anti-self-discharge ability of ion hybrid capacitors.

AB - Pseudocapacitive behavior and ion hybrid capacitors can improve the energy density of supercapacitors, but research has only considered the reaction of cations during the electrochemical process, leading to a flawed mechanistic understanding. Here, the effects of various anions carriers on the electrochemical behaviors of titanium nitride-based zinc ion capacitor (Zn-TiN capacitor) were explored. DFT calculations revealed the stable structure of TiN-SO4 after adsorbed process, enabling SO42− participate in the electrochemical process and construct a two-step adsorption and intercalation energy storage mechanism, improving the capacitance and anti-self-discharge ability of the Zn-TiN capacitor, which delivered an ultrahigh capacitance of 489.8 F g−1 and retained 83.92 % of capacitance even after 500 h resting time. An energy storage system involving anions in the electrochemical process can improve capacitance and anti-self-discharge ability of ion hybrid capacitors.

KW - anions

KW - anti-self-discharge

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DO - 10.1002/anie.202012202

M3 - Journal Article (refereed)

AN - SCOPUS:85096784602

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JO - Angewandte Chemie - International Edition

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Effects of Anion Carriers on Capacitance and Self-Discharge Behaviors of Zinc Ion Capacitors

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Keywords

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