A potassium-tellurium battery

被引：58
作者：
Liu, Qin [1 ,2 ,3 ]
Deng, Wenzhuo [1 ,2 ]
Sun, Chuan-Fu [1 ,2 ]
机构：
[1] Chinese Acad Sci, CAS Key Lab Design & Assembly Funct Nanostruct, Fuzhou 350002, Fujian, Peoples R China
[2] Chinese Acad Sci, Fujian Key Lab Nanomat, Fujian Inst Res Struct Matter, Fuzhou 350002, Fujian, Peoples R China
[3] Univ Chinese Acad Sci, Beijing 100039, Peoples R China
来源：
ENERGY STORAGE MATERIALS | 2020年 / 28卷
基金：
中国国家自然科学基金;
关键词：
Potassium-tellurium battery; Potassium-ion battery; Metal-tellurium battery; Reaction mechanism; Concentrated electrolyte; ION BATTERIES; SULFUR BATTERIES; INTERCALATION; ELECTRODE; SELENIUM; LITHIUM;
D O I：
10.1016/j.ensm.2020.02.021
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：
Developing high-energy-density batteries is essential for storing and utilizing electricity generated from renewable energy sources. Herein, we, for the first time, report a rechargeable potassium-tellurium (K-Te) battery. This new battery system is capable of providing flat voltage plateaus at a high average potential of 1.6 V, high volumetric/specific capacities (2552 mAh cm(Te)(-3) or 409 mAh gTe(-1)) and energy densities (4081 Wh L-Te(-1) or 654 Wh kg(Te)(-1)). Moreover, the intrinsic electron conduction ability of Te cathode enables fast reaction kinetics and good rate capability to K-Te batteries. Combined X-ray powder diffraction and X-ray photoelectron spectroscopy analyses reveal the underlying reaction mechanism, which involves reversible stepwise phase transformations from Te to K2Te3 and ultimately to K5Te3. This work paves the way for the development of high-energy-density K-Te batteries.
引用
收藏
页码：10 / 16
页数：7
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