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Understanding How Nitriles Stabilize Electrolyte/Electrode Interface at High Voltage
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2017-12-05 00:00:00 , DOI: 10.1021/acs.jpclett.7b02734 Huozhen Zhi 1 , Lidan Xing 1 , Xiongwen Zheng 1 , Kang Xu 2 , Weishan Li 1
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2017-12-05 00:00:00 , DOI: 10.1021/acs.jpclett.7b02734 Huozhen Zhi 1 , Lidan Xing 1 , Xiongwen Zheng 1 , Kang Xu 2 , Weishan Li 1
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Nitriles have received extensive attention for their unique ability in stabilizing electrolytes against oxidation at high voltages. It was generally believed that their anodic stability originates from a monolayer of chemisorbed nitrile molecules on transition-metal oxide surface, which physically expels carbonate molecules and prevents their oxidative decomposition. We overturn this belief based on calculation and experimental results and demonstrate that, like many high voltage film-forming electrolyte additives, nitriles also experience an oxidative decomposition at high voltages, and the high oxidation stability of nitrile-containing electrolytes is merely the consequence of a new interphasial chemistry. This important mechanistic correction would be of high significance in guiding the design of new electrolytes and interphases for the future battery chemistries.
中文翻译：
了解腈如何在高压下稳定电解质/电极界面
丁腈橡胶具有独特的稳定电解质抗高电压氧化能力的能力，因此受到了广泛的关注。通常认为，它们的阳极稳定性源于过渡金属氧化物表面上化学吸附的腈分子的单层，其物理上驱逐了碳酸盐分子并阻止了其氧化分解。我们基于计算和实验结果推翻了这一信念，并证明，与许多高压成膜电解质添加剂一样，腈在高压下也会发生氧化分解，而含腈电解质的高氧化稳定性仅是由于新的相间化学。
更新日期：2017-12-05
中文翻译：
了解腈如何在高压下稳定电解质/电极界面
丁腈橡胶具有独特的稳定电解质抗高电压氧化能力的能力，因此受到了广泛的关注。通常认为，它们的阳极稳定性源于过渡金属氧化物表面上化学吸附的腈分子的单层，其物理上驱逐了碳酸盐分子并阻止了其氧化分解。我们基于计算和实验结果推翻了这一信念，并证明，与许多高压成膜电解质添加剂一样，腈在高压下也会发生氧化分解，而含腈电解质的高氧化稳定性仅是由于新的相间化学。
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