High-temperature Self-blocking Lithium Ion Battery Modified by Polypyrrole Coating and Its Performance
AN Haixia1, WANG Jingping1, YANG Li2, YANG Baiqin1, LI Xifei3
1 College of Chemistry and Chemical Engineering, Shaanxi University of Science & Technology, Xi'an 710021, China 2 Changqing Oilfield Branch Company of CNPC, the First Oil Transportation Department, Xi'an 710021, China 3 College of Materials Science and Engineering, Xi'an University of Technology, Xi'an 710021, China
Abstract: Due to many advantages of lithium-ion batteries, in recent years, they have been extensively applied in many fields, especially in digital electronics and electric vehicles. However, the further development of lithium-ion batteries was dragged down by the safety of lithium-ion batteries. To solve the problem, a new temperature-sensitive electrode based on polypyrrole(PPy) material with self-blocking function was explored for lithium ion batteries. A composite electrode of PPy-LiNi0.6Co0.2Mn0.2O2 (PPy-622) with the sandwich structure was prepared and tes-ted for electrochemical behavior. First of all, PPy coating of 5 μm thickness with positive temperature coefficient (PTC) characteristics was prepared on the aluminum foil. After drying, the 622 active material was coated on PPy coating and form a sandwich structure of PPy-622 electrode. At room temperature, the electrochemical behavior of the PPy-622 electrode was similar to that of the 622 electrode without the PTC coa-ting. However, PPy-622 electrode had a clear PTC behavior at about 140 ℃ to show the battery capacity dropped significantly, which can protect the thermal runaway of lithium-ion batteries. Due to the low cost of PPy and the simple preparation process of PPy-622 electrodes, this new PTC electrode offers great possibilities for building a safer lithium-ion battery.
作者简介: 安海霞,2017年6月毕业于陕西科技大学,获得工学学士学位。现在是陕西科技大学化学与化工学院的一名硕士研究生,指导老师是王景平副教授。研究生期间的主要研究方向是PPy基锂离子电池正温度系数电极的制备及性能。 王景平,陕西科技大学化学与化工学院副教授、硕士研究生导师,1997年7月本科毕业于大连工业大学,2011年11月在西安交通大学电信学院取得电子科学与技术专业博士学位,2012 年至 2013年在香港理工大学(中国)进行博士后工作,主要从事高分子材料的成型加工、储能高分子材料以及电化学污水处理的研究工作。 李喜飞,教授,博士研究生导师,入选2018年、2019年科睿唯安全球高被引科学家。现任西安理工大学先进电化学能源研究院执行院长、现代分析测试中心副主任,陕西省储能材料表面技术国际联合研究中心主任,国际电化学能源科学院(IAOEES)副主席,Springer-Nature旗下国际期刊Electrochemical Energy Reviews(即时影响因子已超过18)执行主编,陕西省高性能新能源动力电池创新团队负责人,西安纳米科技学会常务理事等。主要从事微/纳米功能材料界面的设计、优化及二次电池的应用研究。
引用本文:
安海霞, 王景平, 杨立, 杨百勤, 李喜飞. 聚吡咯涂层改性的高温自阻断锂离子电池及其性能[J]. 材料导报, 2021, 35(4): 4007-4011.
AN Haixia, WANG Jingping, YANG Li, YANG Baiqin, LI Xifei. High-temperature Self-blocking Lithium Ion Battery Modified by Polypyrrole Coating and Its Performance. Materials Reports, 2021, 35(4): 4007-4011.
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2021, Vol. 35 
