All-solid-state lithium batteries (ASSLBs) with Ni-rich cathodes are promising candidates for achieving high energy and improved safety. However, their electrochemical performance is limited by cathode loading, especially in the absence of conductive agents. Herein, we utilize electronically conductive Li-deficient LiNiO₂ (LD-LNO) to construct high-areal-capacity ASSLBs under high cathode loading. This LD-LNO shows an inherent enhanced electronic conductivity and minimal surface impurities. Electrochemical analysis combined with solid-state nuclear magnetic resonance spectroscopy demonstrates the mitigation of the detrimental H3 phase transition and the side reactions at the LD-LNO/Li₆PS₅Cl interface. As a result, LD-LNO-based ASSLBs achieve competitive cyclability and rate capability without the need for cathode modifications. A high reversible areal capacity of 15.2 mAh cm^–2 is attained at 35 °C under a 133.8 mg cm^–2 LD-LNO mass loading. This work sheds light on electronically conductive cathodes, providing a perspective for addressing the high cathode loading issue in ASSLBs.

中文翻译：

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由电子导电缺锂 LiNiO2 阴极实现的高面容量全固态锂电池


具有富镍阴极的全固态锂电池 （ASSLB） 是实现高能量和提高安全性的有前途的候选者。然而，它们的电化学性能受到阴极负载的限制，尤其是在没有导电剂的情况下。在此，我们利用电子导电缺锂 LiNiO₂ （LD-LNO） 在高阴极负载下构建高面容量 ASSLB。这种 LD-LNO 具有固有的增强电子导电性和最小的表面杂质。电化学分析与固态核磁共振波谱相结合，表明有害的 H3 相变和 LD-LNO/Li₆PS₅Cl 界面的副反应有所缓解。因此，基于 LD-LNO 的 ASSLB 无需阴极改性即可实现具有竞争力的循环性和倍率能力。在 15.2 mg cm^–2 LD-LNO 质量负载下，在 35 °C 下获得 2 mAh cm^–2 的高可逆面容量。这项工作阐明了导电阴极，为解决 ASSLB 中的高阴极负载问题提供了视角。