锂空气电池电极研究取得进展

发布时间：2018-04-02 19:57

本文选题：电池电极　切入点：氧化锂　出处：《特种铸造及有色合金》2017年09期

【摘要】：正锂空气电池因具有超高的理论能量密度而被认为是电动汽车的潜在动力电源。锂氧电池的放电产物过氧化锂(Li_2O_2)具有绝缘、不溶的特性,因此,随着放电的进行,电极表面会逐渐被其钝化而导致放电终止。大尺寸Li_2O_2的生成有助于延缓正极表面的钝化、延长放电时间、提高电池容量。然而,大尺寸Li_2O_2在电极表面往往随机散落,难以保证其与电极材料之间的有效接触,从而限制了电池的倍率性能和能量效率。因此,亟需实现大尺寸Li_2O_2在电极材料中的嵌入式生长。
[Abstract]:Due to its high theoretical energy density, positive lithium air batteries are considered as potential power sources for electric vehicles.The discharge product of Li-O _ 2 battery has the characteristics of insulation and insolubility. Therefore, the electrode surface will be passivated gradually and the discharge will be terminated with the discharge of Li-O _ 2 battery.The formation of large size Li_2O_2 can delay the passivation of the cathode surface, prolong the discharge time and increase the battery capacity.However, the large size Li_2O_2 is often scattered randomly on the electrode surface, so it is difficult to guarantee the effective contact with the electrode material, which limits the performance of the battery and the energy efficiency.Therefore, it is urgent to realize the embedded growth of large size Li_2O_2 in electrode materials.
【分类号】：TM911.41

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