【摘要】 目前,有机电解液体系锂空气电池的发展面临两大挑战:一是电解液或氧气易腐蚀锂负极;二是电解液中氧气传输速率低。使用硝酸锂作为成膜添加剂、全氟三丁胺作为溶氧添加剂,对LiTFSI-TMS电解液进行优化。两者的协同效应显著提高了电解液电导率、溶氧量、电化学稳定性以及与锂负极的化学稳定性。结果表明,在0.1mA/cm2的电流密度下,优化后的电池稳定循环了150次,明显超过优化前的120次。更多还原

【Abstract】 Twin problems has long disturbed the progress of current non-aqueous lithium air battery: one is the corrosion of lithium anode caused by O₂ or electrolyte, and the other is low oxygen transfer speed in the electrolyte. In the present paper, a Li TFSI-TMS electrolyte was well optimized using lithium nitrate as film-forming additive and perfluorotributylamine as an oxygen carrier. A synergistic effect is therefore obviously verified by the fantastic improvement of conductivity, oxygen solubility, electrochemical stability and chemical compatibility to lithium anode. At last, it is observed that the newly-modified battery cycles for more than 150 cycles, far exceeding 120 cycles for that without any modification at a current density of 0.1 m A/cm2.更多还原