High energy density hybrid Mg2+/Li+ battery with superior ultra-low temperature performance

被引:65
|
作者
Zhang, Zhonghua [1 ,2 ]
Xu, Huimin [3 ]
Cui, Zili [1 ]
Hu, Pu [1 ]
Chai, Jingchao [1 ]
Du, Huiping [1 ]
He, Jianjiang [1 ]
Zhang, Jianjun [1 ]
Zhou, Xinhong [3 ]
Han, Pengxian [1 ]
Cui, Guanglei [1 ]
Chen, Liquan [4 ]
机构
[1] Chinese Acad Sci, Qingdao Ind Energy Storage Res Inst, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao 266101, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100190, Peoples R China
[3] Qingdao Univ Sci & Technol, Coll Chem & Mol Engn, Qingdao 266042, Peoples R China
[4] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 102488, Peoples R China
基金
中国国家自然科学基金; 国家高技术研究发展计划(863计划);
关键词
RECHARGEABLE MAGNESIUM BATTERIES; ELECTROLYTE-SOLUTIONS; CURRENT COLLECTORS; MG BATTERIES; ION BATTERY; CATHODE; STABILITY; CHEMISTRY; CORROSION; STORAGE;
D O I
10.1039/c5ta09591c
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
The development of high energy density rechargeable Mg-based batteries operating in a wide electrochemical window and ultra-low temperature remains a great challenge owing to parasitic side reactions between electrolytes and battery components when examined at high operating potentials (above 2.0 V vs. Mg2+/Mg). Herein we propose a flexible pyrolytic graphitic film (GF) as a reliable current collector of high-voltage cathodes for a hybrid Mg2+/Li+ battery within a pouch cell configuration. The utilization of such a highly electrochemical stable GF unlocks the critical bottleneck of incompatibility among all battery parts, especially parasitic corrosive reactions between electrolytes and currently available current collectors, which takes a big step forward towards the practical applications of Mg-based batteries. With an operating potential of 2.4 V, the hybrid Mg2+/Li+ battery designed by us can deliver a maximum energy density of 382.2 W h kg(-1), which significantly surpasses that of the conventional Mg battery (about 60 W h kg(-1)), and the Al battery (about 40 W h kg(-1)) as well as the state-of-the-art hybrid Na/Mg and Li/Mg batteries. The electrochemical property of the hybrid Mg2+/Li+ battery is also characterized by higher rate capability (68.8 mA h g(-1) at 3.0C), higher coulombic efficiency of 99.5%, and better cyclic stability (98% capacity retention after 200 cycles at 1.0C). In addition, the designed hybrid battery delivers excellent electrochemical performance at an ultra-low temperature of -40 degrees C, at which it retains 77% capacity compared to that of room temperature. Our strategy opens up a new possibility for widespread applications of graphitic current collectors towards high energy rechargeable Mg-based hybrid batteries, especially applied in polar regions, aerospace, and deep offshore waters.
引用
收藏
页码:2277 / 2285
页数:9
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