On‐board vehicle applications dictate the need for improved low‐temperature power densities of rechargeable batteries. Integration of high‐permittivity artificial dielectric solid electrolyte interfaces (SEIs) into the lithium ion battery architecture is a promising path to satisfy this need. The relationship between the permittivity of various artificial dielectric SEIs and the resulting high‐rate capability at low temperatures is investigated. Room‐temperature studies reveal a weak relationship between these variables. However, at low temperatures, the correlation between the larger permittivity of the dielectric SEIs and the greater high‐rate capabilities of the cells is striking. The high‐rate capabilities for pulsed laser deposition‐synthesized cathode thin films with various BaTiO₃ (BTO) SEIs covering configurations are evaluated. A remarkable improvement in the high‐rate capability is observed for LiCoO₂ (LCO) modified with dot BTOs, while the rate capability for planar BTO (fully covered LCO) is weakened significantly. A series of experimental results prove that a large polarization, P, in the dielectric SEIs intensified with permittivity accelerates interfacial charge transfer near the dielectrics–LCO–electrolyte triple junction.

中文翻译：

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通过极化辅助离子途径实现锂电池的低温高容量

车载车辆的应用表明需要提高可充电电池的低温功率密度。将高介电常数的人造介电固体电解质界面（SEI）集成到锂离子电池架构中，是满足这一需求的有前途的途径。研究了各种人造电介质SEI的介电常数与其在低温下产生的高倍率能力之间的关系。室温研究表明这些变量之间的关系很弱。然而，在低温下，电介质SEI的较大介电常数与电池更高的高倍率性能之间的相关性令人惊讶。具有各种BaTiO _3的脉冲激光沉积合成阴极薄膜的高速率能力（BTO）评估涵盖配置的SEI。观察到用点BTO改性的LiCoO ₂（LCO）的高倍率能力有了显着改善，而平面BTO（完全覆盖的LCO）的倍率能力则明显减弱。一系列实验结果证明，随着介电常数增强的电介质SEI中的大极化P加速了电介质–LCO –电解质三重结附近的界面电荷转移。