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Solvation Structure Tuning Induces LiF/Li3N-Rich CEI and SEI Interfaces for Superior Li/CFx Batteries
Small ( IF 13.0 ) Pub Date : 2023-08-22 , DOI: 10.1002/smll.202303149 Ping Li 1 , Zhe Cheng 1 , Jialu Liu 1 , Lukang Che 1 , Yingke Zhou 1 , Enmin Xu 1 , Xiaohui Tian 1 , Zhongzhi Yuan 2
Small ( IF 13.0 ) Pub Date : 2023-08-22 , DOI: 10.1002/smll.202303149 Ping Li 1 , Zhe Cheng 1 , Jialu Liu 1 , Lukang Che 1 , Yingke Zhou 1 , Enmin Xu 1 , Xiaohui Tian 1 , Zhongzhi Yuan 2
Affiliation
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The electrode/electrolyte interfaces play an important role in the electrochemical reaction kinetics to alleviate the severe polarization and voltage hysteresis in lithium primary batteries. Herein, C5F5N is proposed as an electrolyte additive to tune the characteristics of the electrode/electrolyte interfaces. The Li/CFx primary battery with C5F5N additive exhibits an excellent discharge-specific capacity of 981.4 mAh g−1 (0.1 C), a remarkable high-rate capability of 598 mAh g−1 (15 C), and an outstanding energy/power density of 1068.7 Wh kg−1/24362.5 W kg−1. It also shows remarkable storage performance with 717.2 mAh g−1 at 0.1 C after storage at 55 °C for 2 months. The excellent performance of the Li/CFx batteries is closely related to the improved and stable Li3N/LiF-rich homogeneous interfaces induced by the C5F5N additive, which results in uniform distribution of Li+ flux, facilitated electrochemical kinetics, and increased rate capability of Li/CFx battery. Therefore, C5F5N is expected to be a promising electrolyte additive, and the related electrode/electrolyte interface engineering provides an effective and facile strategy to increase the performance of the lithium primary battery.
中文翻译：
溶剂化结构调节可产生富含 LiF/Li3N 的 CEI 和 SEI 界面，从而实现卓越的 Li/CFx 电池
电极/电解质界面在电化学反应动力学中发挥着重要作用，可缓解锂原电池中严重的极化和电压滞后现象。在此，提出C 5 F 5 N作为电解质添加剂来调节电极/电解质界面的特性。添加C 5 F 5 N的Li/CF x原电池表现出优异的放电比容量（981.4 mAh g -1 (0.1 C)）和显着的高倍率容量（598 mAh g -1 (15 C)），并且出色的能量/功率密度为 1068.7 Wh kg −1 /24362.5 W kg −1 。在55°C储存2个月后，它还表现出出色的存储性能，0.1C时为717.2mAh g -1 。 Li/CF x电池的优异性能与C 5 F 5 N添加剂诱导的改善且稳定的富含Li 3 N/LiF的均匀界面密切相关，从而导致Li +通量均匀分布，促进电化学动力学，并提高了Li/CF x电池的倍率性能。因此，C 5 F 5 N有望成为一种有前途的电解质添加剂，相关的电极/电解质界面工程为提高锂原电池的性能提供了有效且简便的策略。
更新日期：2023-08-22
中文翻译：
溶剂化结构调节可产生富含 LiF/Li3N 的 CEI 和 SEI 界面，从而实现卓越的 Li/CFx 电池
电极/电解质界面在电化学反应动力学中发挥着重要作用，可缓解锂原电池中严重的极化和电压滞后现象。在此，提出C 5 F 5 N作为电解质添加剂来调节电极/电解质界面的特性。添加C 5 F 5 N的Li/CF x原电池表现出优异的放电比容量（981.4 mAh g -1 (0.1 C)）和显着的高倍率容量（598 mAh g -1 (15 C)），并且出色的能量/功率密度为 1068.7 Wh kg −1 /24362.5 W kg −1 。在55°C储存2个月后，它还表现出出色的存储性能，0.1C时为717.2mAh g -1 。 Li/CF x电池的优异性能与C 5 F 5 N添加剂诱导的改善且稳定的富含Li 3 N/LiF的均匀界面密切相关，从而导致Li +通量均匀分布，促进电化学动力学，并提高了Li/CF x电池的倍率性能。因此，C 5 F 5 N有望成为一种有前途的电解质添加剂，相关的电极/电解质界面工程为提高锂原电池的性能提供了有效且简便的策略。
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