Fast potassium storage in Ba0.5Ti2(PO4)3/C nanospheres for high-performance potassium-ion hybrid capacitors

被引：9
作者：
Dai, Jing [1 ]
Zhao, Chenke [1 ]
Yang, Nian [1 ]
Wang, He [1 ]
Liu, Li [1 ]
Yang, Jianping [1 ]
Wang, Qianfu [1 ]
Zhang, Wen [1 ]
Hu, Hai [1 ]
机构：
[1] Xiangtan Univ, Sch Chem, Natl Base Int Sci & Technol Cooperat,Hunan Prov K, Natl Local Joint Engn Lab Key Mat New Energy Stor, Xiangtan 411105, Peoples R China
来源：
JOURNAL OF POWER SOURCES | 2022年 / 518卷
基金：
中国国家自然科学基金;
关键词：
Potassium-ion hybrid capacitors; Anode material; Ra0.5Li2(PO4)(3) nanospheres; Hydrothermal method; CATHODE; ELECTRODE; NITROGEN;
D O I：
10.1016/j.jpowsour.2021.230771
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Combined with the advantages of capacitor and potassium ion battery, potassium ion hybrid capacitor (PIHCs) are regarded as a promising energy storage device due to their high energy density and excellent cycle stability. However, their development are limited due to the different energy storage mechanism between anode and cathode. Herein, the carbon coated Ba0.5Ti2(PO4) 3 nanospheres (BTP/C NSs) are synthesized via hydrothermal method and applied to potassium ion hybrid capacitors integrated with activated carbon as cathode in a voltage window of 1.0-3.8 V, affording a maximum energy density of 566.1 Wh kg(-1) and maximum power density of 4576.9 W kg(-1) together with excellent cyclability. These results indicate that the BTP/C NSs display great potential as anode for PIHCs.
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页数：7
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