期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 60, 期 2, 页码 1011-1021出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202012202
关键词
anions; anti-self-discharge; titanium nitride; zinc ion capacitors
资金
- GRF [N_CityU11305218]
- National Natural Science Foundation of China [51974208]
- Natural Science Funds of Hubei Province for Distinguished Young Scholar [2020CFA099]
- Hubei Province Natural Science Foundation Innovation Group Project [2019CFA020]
Research has shown that involving anions in the reaction process can improve the capacitance and anti-self-discharge ability of ion hybrid capacitors, leading to a stable energy storage mechanism.
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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