The new hydroxyapatite ultra-long nanowire-based high-temperature battery separator has good flexibility and mechanical strength
The new hydroxyapatite ultra-long nanowire-based high-temperature battery separator has excellent thermal stability and fire resistance
The use of new hydroxyapatite ultra-long nanowire-based high-temperature battery separator assembly of the whole battery has a higher specific capacity and more stable cycle performance
The use of new hydroxyapatite ultra-long nanowire-based high-temperature battery separator assembly of the battery in the 150 ℃ high temperature environment to maintain normal working conditions and light bulb
Lithium-ion batteries are widely used in portable electronic devices such as laptops, mobile phones, digital cameras, etc. Battery diaphragms are key materials that protect the battery and affect battery performance, prevent contact with positive and negative electrodes, prevent battery short circuits, and transmit The thermal stability of the diaphragm determines the tolerance of the battery temperature range and the safety of the battery.At present, the commercial lithium-ion battery separator is mainly polyolefin organic diaphragm, the advantage is cheap, good mechanical properties, And has good electrochemical stability; lack of porosity is low, the wetting of the electrolyte is poor, poor thermal stability, may lead to short circuit batteries, serious can lead to fire or explosion and other accidents, there are security risks.
Recently, the Chinese Academy of Sciences Shanghai Institute of Ceramics researcher Zhu Yingjie led the team, and Huazhong University of Science and Technology Professor Hu Xianlao led the team, in the previous hydroxyapatite long nanowires new inorganic refractory paper research work, based on the development of A new type of hydroxyapatite ultra-long nanowire-based high-temperature lithium-ion battery separator, the battery separator has many advantages, such as high flexibility, good mechanical strength, high porosity, electrolyte wetting and adsorption performance, thermal stability High temperature, high temperature resistance, flame retardant, high temperature at 700 ℃ can still maintain its structural integrity.Using new hydroxyapatite long nanowire-based high temperature battery separator assembled batteries, than the use of polypropylene diaphragm assembly The battery has better electrochemical performance, cycle stability and magnification performance.More importantly, the use of hydroxyapatite ultra-long nanowire-based high-temperature battery separator assembly of the battery has excellent thermal stability, high temperature, 150 ℃ high temperature environment to maintain normal working conditions, and light small bulbs; polypropylene diaphragm assembly of the battery at 150 ℃ high temperature quickly short circuit. If the use of the new hydroxyapatite long nanowire-based high-temperature battery separator, and then match the high temperature of the electrolyte and electrode materials, can further significantly improve the operating temperature and safety of the battery.The research work to significantly increase the lithium ion The operating temperature range of the battery and the safety of the lithium-ion battery are expected.The new hydroxyapatite ultra-long nanowire-based high-temperature battery separator can also be applied to a variety of other types of high temperature batteries and energy storage systems such as Sodium batteries, supercapacitors, etc. Related research results published in the "advanced materials", and apply for an invention patent.
The research work was supported by the National Natural Science Foundation of China, Shanghai Science and Technology Commission, Shanghai Institute of Ceramics, Chinese Academy of Sciences.
