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Stabilizing Li–O2 Batteries with Multifunctional Fluorinated Graphene
Nano Letters ( IF 9.6 ) Pub Date : 2022-06-10 , DOI: 10.1021/acs.nanolett.2c01713 Xiaohong Wu 1 , Xiaotong Wang 1 , Zhengang Li 1 , Libin Chen 1 , Shiyuan Zhou 1 , Haitang Zhang 1 , Yu Qiao 1, 2 , Hongjun Yue 3 , Ling Huang 1 , Shi-Gang Sun 1
Nano Letters ( IF 9.6 ) Pub Date : 2022-06-10 , DOI: 10.1021/acs.nanolett.2c01713 Xiaohong Wu 1 , Xiaotong Wang 1 , Zhengang Li 1 , Libin Chen 1 , Shiyuan Zhou 1 , Haitang Zhang 1 , Yu Qiao 1, 2 , Hongjun Yue 3 , Ling Huang 1 , Shi-Gang Sun 1
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As a full cell system with attractive theoretical energy density, challenges faced by Li–O2 batteries (LOBs) are not only the deficient actual capacity and superoxide-derived parasitic reactions on the cathode side but also the stability of Li-metal anode. To solve simultaneously intrinsic issues, multifunctional fluorinated graphene (CFx, x = 1, F-Gr) was introduced into the ether-based electrolyte of LOBs. F-Gr can accelerate O2– transformation and O2–-participated oxygen reduction reaction (ORR) process, resulting in enhanced discharge capacity and restrained O2–-derived side reactions of LOBs, respectively. Moreover, F-Gr induced the F-rich and O-depleted solid electrolyte interphase (SEI) film formation, which have improved Li-metal stability. Therefore, energy storage capacity, efficiency, and cyclability of LOBs have been markedly enhanced. More importantly, the method developed in this work to disperse F-Gr into an ether-based electrolyte for improving LOBs’ performances is convenient and significant from both scientific and engineering aspects.
中文翻译：
用多功能氟化石墨烯稳定 Li-O2 电池
作为具有有吸引力的理论能量密度的全电池系统，Li-O 2电池（LOBs）面临的挑战不仅在于正极侧实际容量不足和超氧化物衍生的寄生反应，还在于锂金属负极的稳定性。为了同时解决固有问题，将多功能氟化石墨烯（CF x，x = 1，F-Gr）引入LOB的醚基电解质中。F-Gr可以加速O 2 –转化和O 2 –参与氧还原反应（ORR）过程，从而提高放电容量并抑制O 2 –- 衍生的 LOB 副反应，分别。此外，F-Gr 诱导了富氟和贫氧固体电解质界面 (SEI) 膜的形成，从而提高了锂金属的稳定性。因此，LOBs的储能容量、效率和可循环性得到了显着提高。更重要的是，这项工作中开发的将 F-Gr 分散到醚基电解质中以提高 LOB 性能的方法在科学和工程方面都具有便利性和意义。
更新日期：2022-06-10
中文翻译：
用多功能氟化石墨烯稳定 Li-O2 电池
作为具有有吸引力的理论能量密度的全电池系统，Li-O 2电池（LOBs）面临的挑战不仅在于正极侧实际容量不足和超氧化物衍生的寄生反应，还在于锂金属负极的稳定性。为了同时解决固有问题，将多功能氟化石墨烯（CF x，x = 1，F-Gr）引入LOB的醚基电解质中。F-Gr可以加速O 2 –转化和O 2 –参与氧还原反应（ORR）过程，从而提高放电容量并抑制O 2 –- 衍生的 LOB 副反应，分别。此外，F-Gr 诱导了富氟和贫氧固体电解质界面 (SEI) 膜的形成，从而提高了锂金属的稳定性。因此，LOBs的储能容量、效率和可循环性得到了显着提高。更重要的是，这项工作中开发的将 F-Gr 分散到醚基电解质中以提高 LOB 性能的方法在科学和工程方面都具有便利性和意义。
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