A new tunnel-type V4O9 cathode for high power density aqueous zinc ion batteries

被引：35
作者：
Wang, Qiaoran [1 ]
Sun, Tianjiang [1 ]
Zheng, Shibing [1 ]
Li, Lin [1 ]
Ma, Tao [1 ]
Liang, Jing [1 ]
机构：
[1] Nankai Univ, Key Lab Adv Energy Mat Chem, Minist Educ, 94 Weijin Rd, Tianjin 300071, Peoples R China
来源：
INORGANIC CHEMISTRY FRONTIERS | 2021年 / 8卷 / 20期
关键词：
STORAGE; PERFORMANCE; CHEMISTRY;
D O I：
10.1039/d1qi00747e
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
A mixed valence V4O9 with a tunnel structure and room temperature metallic properties was prepared via partially reducing vanadium pentoxide. Its unique tunnel structure and metallic characteristics are beneficial for fast zinc ion and electron diffusion. A Zn//V4O9 battery displays a high rate performance of 234.4 mA h g(-1) at 50C, a large reversible capacity of 420 mA h g(-1) at 0.5C, and good cycling stability. The intercalation mechanism of Zn2+ and H+ is proved by in situ XRD, ex situ XPS, and other characterization techniques, along with density functional theory calculations. This work provides a strategy to improve the electrochemical performance of vanadium oxides through valence regulation.
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收藏
页码：4497 / 4506
页数：10
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