With the electrochemical performance of batteries approaching the bottleneck gradually, it is increasingly urgent to solve the safety issue. Herein, all-in-one strategy is ingeniously developed to design smart, safe, and simple (3S) practical pouch-type LiNi_0.8Co_0.1Mn_0.1O₂||Graphite@SiO (NCM811||Gr@SiO) cell, taking full advantage of liquid and solid-state electrolytes. Even under the harsh thermal abuse and high voltage condition (100 °C, 3–4.5 V), the pouch-type 3S NCM811||Gr@SiO cell can present superior capacity retention of 84.6% after 250 cycles (based pouch cell: 47.8% after 250 cycles). More surprisingly, the designed 3S NCM811||Gr@SiO cell can efficiently improve self-generated heat T₁ by 45 °C, increase TR triggering temperature T₂ by 40 °C, and decrease the TR highest T₃ by 118 °C. These superior electrochemical and safety performances of practical 3S pouch-type cells are attributed to the robust and stable anion-induced electrode-electrolyte interphases and local solid-state electrolyte protection layer. All the fundamental findings break the conventional battery design guidelines and open up a new direction to develop practical high-performance batteries.

中文翻译：

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智能固态中间相实现高安全、高能量实用锂电池

随着电池的电化学性能逐渐逼近瓶颈，解决安全问题日益迫切。在此，巧妙地开发了一体化策略，设计了智能、安全、简单（3S）实用的袋型LiNi _0.8 Co _0.1 Mn _0.1 O ₂ ||Graphite@SiO（NCM811||Gr@SiO）电池，充分利用液态和固态电解质。即使在严酷的热滥用和高电压条件下（100°C，3-4.5V），软包型3S NCM811||Gr@SiO电池在250次循环后仍能呈现出84.6%的卓越容量保持率（基于软包电池：47.8） 250 个循环后的%）。更令人惊讶的是，所设计的3S NCM811||Gr@SiO电池可以有效地将自生热T ₁提高45℃，将TR触发温度T ₂提高40℃，并将TR最高T ₃降低118℃。实用3S袋型电池的这些优异的电化学和安全性能归因于坚固且稳定的阴离子诱导电极-电解质界面和局部固态电解质保护层。所有的基本发现都打破了传统的电池设计准则，为开发实用的高性能电池开辟了新的方向。