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A High‐Performance Li–O2 Battery with a Strongly Solvating Hexamethylphosphoramide Electrolyte and a LiPON‐Protected Lithium Anode
Advanced Materials ( IF 27.4 ) Pub Date : 2017-06-06 , DOI: 10.1002/adma.201701568
Bin Zhou 1, 2 , Limin Guo 1 , Yantao Zhang 1 , Jiawei Wang 1 , Lipo Ma 1 , Wen-Hua Zhang 2 , Zhengwen Fu 3 , Zhangquan Peng 1
Advanced Materials ( IF 27.4 ) Pub Date : 2017-06-06 , DOI: 10.1002/adma.201701568
Bin Zhou 1, 2 , Limin Guo 1 , Yantao Zhang 1 , Jiawei Wang 1 , Lipo Ma 1 , Wen-Hua Zhang 2 , Zhengwen Fu 3 , Zhangquan Peng 1
Affiliation
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The aprotic Li–O2 battery has attracted a great deal of interest because theoretically it can store more energy than today's Li‐ion batteries. However, current Li–O2 batteries suffer from passivation/clogging of the cathode by discharged Li2O2, high charging voltage for its subsequent oxidation, and accumulation of side reaction products (particularly Li2CO3 and LiOH) upon cycling. Here, an advanced Li–O2 battery with a hexamethylphosphoramide (HMPA) electrolyte is reported that can dissolve Li2O2, Li2CO3, and LiOH up to 0.35, 0.36, and 1.11 × 10−3m, respectively, and a LiPON‐protected lithium anode that can be reversibly cycled in the HMPA electrolyte. Compared to the benchmark of ether‐based Li–O2 batteries, improved capacity, rate capability, voltaic efficiency, and cycle life are achieved for the HMPA‐based Li–O2 cells. More importantly, a combination of advanced research techniques provide compelling evidence that operation of the HMPA‐based Li–O2 battery is backed by nearly reversible formation/decomposition of Li2O2 with negligible side reactions.
中文翻译：
高性能Li-O2电池，具有强溶解性的六甲基磷酰胺电解质和受LiPON保护的锂阳极
非质子传递Li-O 2电池引起了极大的兴趣，因为从理论上讲，它可以比今天的锂离子电池存储更多的能量。但是，当前的Li–O 2电池会因放电的Li 2 O 2而钝化/阻塞阴极，随后的氧化需要较高的充电电压，并且在循环时会积聚副反应产物（尤其是Li 2 CO 3和LiOH）。在此，据报道，具有六甲基磷酰胺（HMPA）电解质的高级Li–O 2电池可溶解Li 2 O 2，Li 2 CO 3和LiOH的溶解度高达0.35、0.36和1.11×10分别为−3 m和一个受LiPON保护的锂阳极，该阳极可在HMPA电解质中可逆循环。相比，基于醚的锂-O基准2层的电池，改善的容量，倍率性能，电流效率，以及循环寿命对于基于HMPA-栗-O达到2个细胞。更重要的是，先进研究技术的结合提供了令人信服的证据，证明基于HMPA的Li–O 2电池的运行受到几乎可以逆转的Li 2 O 2的形成/分解和副反应的支持。
更新日期：2017-06-06
中文翻译：
高性能Li-O2电池，具有强溶解性的六甲基磷酰胺电解质和受LiPON保护的锂阳极
非质子传递Li-O 2电池引起了极大的兴趣，因为从理论上讲，它可以比今天的锂离子电池存储更多的能量。但是，当前的Li–O 2电池会因放电的Li 2 O 2而钝化/阻塞阴极，随后的氧化需要较高的充电电压，并且在循环时会积聚副反应产物（尤其是Li 2 CO 3和LiOH）。在此，据报道，具有六甲基磷酰胺（HMPA）电解质的高级Li–O 2电池可溶解Li 2 O 2，Li 2 CO 3和LiOH的溶解度高达0.35、0.36和1.11×10分别为−3 m和一个受LiPON保护的锂阳极，该阳极可在HMPA电解质中可逆循环。相比，基于醚的锂-O基准2层的电池，改善的容量，倍率性能，电流效率，以及循环寿命对于基于HMPA-栗-O达到2个细胞。更重要的是，先进研究技术的结合提供了令人信服的证据，证明基于HMPA的Li–O 2电池的运行受到几乎可以逆转的Li 2 O 2的形成/分解和副反应的支持。
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