非水电解质锂空气电池放电过程  

Discharging process of Li-air batteries with non-aqueous electrolyte

作　　者：闫宇星[1,2] 张英杰[1] 董鹏[1] 

机构地区：[1]昆明理工大学冶金与能源工程学院,云南昆明650093 [2]曲靖师范学院化学化工学院,云南曲靖655011

出　　处：《电源技术》2015年第8期1654-1657,1677,共5页Chinese Journal of Power Sources

基　　金：云南省自然科学基金(2009FXW002);云南省教育厅基金(2010[493])

摘　　要：对PC/EC基电解质体系锂空气电池放电产物进行X射线衍射(XRD)和傅里叶变换红外光谱法(FTIR)的检测,表明主要存在碳酸锂、乙酸锂、乙二酸锂、甲酸锂四种物质;与循环伏安曲线2.1和2.3 V两个小的还原峰相对应,说明环状烷基受到亲核攻击,电解液中溶剂发生分解,参与了反应,指出该类电池的放电终止是由于电解液消耗殆尽导致。以此为基础建立了锂空气电池的放电过程模型,进一步阐述了环状烷基类体系下锂空气电池的放电过程。The discharge products of lithium-air batteries with PC/EC electrolyte were characterized by X-ray diffraction and FTIR spectra, and the result shows that the mixture of PC and EC are easily to decompose to form lithium carbonate, lithium acetate, lithium oxalate and lithium formate, corresponding to the two small reduction peaks of 2.1 and 2.3 V in the cyclic voltmmetry curve, indicating that the cyclic alkyl group is attacked by the nucleophilic, and the solvent in the electrolyte is decomposed and participates in the discharge reaction, as well as pointing out that discharge termination is due to the electrolyte depletion. The discharge process model of lithium-air battery was established, and the lithium-air battery discharge process with cyclic alkyl class electrolyte system was demonstrated.

关 键 词：非水系电解质 锂空气电池 循环伏安曲线 放电过程 亲核攻击 

分 类 号：TM91[电气工程—电力电子与电力传动]