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A Lithium–Air Battery Stably Working at High Temperature with High Rate Performance
Author(s) -
Pan Jian,
Li Houpu,
Sun Hao,
Zhang Ye,
Wang Lie,
Liao Meng,
Sun Xuemei,
Peng Huisheng
Publication year - 2018
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201703454
Subject(s) - materials science , battery (electricity) , lithium (medication) , electrolyte , flammable liquid , work (physics) , ionic conductivity , cathode , chemical engineering , electrical engineering , mechanical engineering , chemistry , thermodynamics , electrode , organic chemistry , power (physics) , medicine , physics , engineering , endocrinology
Driven by the increasing requirements for energy supply in both modern life and the automobile industry, the lithium–air battery serves as a promising candidate due to its high energy density. However, organic solvents in electrolytes are likely to rapidly vaporize and form flammable gases under increasing temperatures. In this case, serious safety problems may occur and cause great harm to people. Therefore, a kind of lithium–air that can work stably under high temperature is desirable. Herein, through the use of an ionic liquid and aligned carbon nanotubes, and a fiber shaped design, a new type of lithium–air battery that can effectively work at high temperatures up to 140 °C is developed. Ionic liquids can offer wide electrochemical windows and low vapor pressures, as well as provide high thermal stability for lithium–air batteries. The aligned carbon nanotubes have good electric and heat conductivity. Meanwhile, the fiber format can offer both flexibility and weavability, and realize rapid heat conduction and uniform heat distribution of the battery. In addition, the high temperature has also largely improved the specific powers by increasing the ionic conductivity and catalytic activity of the cathode. Consequently, the lithium–air battery can work stably at 140 °C with a high specific current of 10 A g ‐1 for 380 cycles, indicating high stability and good rate performance at high temperatures. This work may provide an effective paradigm for the development of high‐performance energy storage devices.