A High‐Rate and Long‐Life Rechargeable Battery Operated at −75 oC,Batteries & Supercaps

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A High‐Rate and Long‐Life Rechargeable Battery Operated at −75 oC
Batteries & Supercaps ( IF 5.1 ) Pub Date : 2020-06-09 , DOI: 10.1002/batt.202000117
Xiaoli Dong ₁ , Yang Yang ₁ , Panlong Li ₁ , Zhong Fang ₁ , Yonggang Wang ₁ , Yongyao Xia _{1,

2}

Affiliation

Intercalation compounds are commonly‐used electrodes for commercialized lithium ion batteries (LIBs), while suffering from the sluggish interfacial processes at subzero temperature. Herein, nanoscale Nb₂O₅ has been investigated as a viable cathode for rechargeable batteries operated at the temperature of as low as −75 °C. Benefitting from the surface‐controlled charge storage process, the intrinsic intercalation pseudocapacitance of Nb₂O₅ broke the rate limitation at low temperature. Particularly, the battery exhibited outstanding rate performance (100 C) at room temperature and delivered high a reversible charge/discharge with a high capacity of 121 mAh g⁻¹ at −75 °C. Furthermore, a capacity retention of 50 % and a long life for 100 cycles without capacity fading were achieved with a rate of 0.5 C at such low temperature. Based on the outstanding electrochemical performance from −75 °C to +25 °C, it can be envisaged that materials with intercalation pseudocapacitive behavior could be served as good candidate for energy storage systems under extreme conditions.

中文翻译：

可在−75 oC的温度下使用的长寿命可充电电池

插层化合物是用于商业化锂离子电池（LIB）的常用电极，但在零度以下温度下会经历缓慢的界面过程。在此，已经研究了纳米级Nb ₂ O ₅作为在低至-75℃的温度下操作的可再充电电池的可行阴极。受益于表面控制的电荷存储过程，Nb ₂ O ₅的固有嵌入拟电容打破了低温下的速率限制。特别地，该电池在室温下表现出优异的速率性能（100 C），并且以121 mAh g ^-1的高容量提供了高的可逆充放电。在-75°C下。此外，在这样的低温下以0.5℃的速率获得了50％的容量保持率和100个循环的长寿命而没有容量衰减。基于从-75°C到+25°C的出色电化学性能，可以设想具有插层拟电容特性的材料可以用作极端条件下储能系统的良好选择。

更新日期：2020-06-09

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