High-power all-solid-state batteries using sulfide superionic conductors
High-power all-solid-state batteries using sulfide superionic conductors
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DOI：
10.1038/nenergy.2016.30
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发表时间：
2016-03-21
期刊：
影响因子：
56.7
通讯作者：
Kanno, Ryoji
中科院分区：
文献类型：
--
作者：
Kato, Yuki;Hori, Satoshi;Kanno, Ryoji
与具有液体电解质的锂离子电池相比，全固态电池由于其在提高安全性和实现高功率和高能量密度方面的潜力而提供了有吸引力的选择。尽管进行了广泛的研究工作，但全固态电池的发展仍然没有达到预期，主要是因为缺乏实际应用所需的电解质的合适候选材料。在这里，我们报道了具有极高电导率（Li9.54Si1.74P1.44S11.7Cl0.3为25 mS cm（-1））以及高稳定性（类似于Li9.6P3S12相对于Li金属的0 V）的锂超离子导体。基于这种锂导体制造的全固态电池被发现具有非常小的内阻，特别是在100摄氏度下。该电池具有高的比功率，上级传统的液体电解质电池。还展示了具有18 C的高电流密度的稳定循环（仅在三分钟内充电/放电;其中C是C速率）。
Compared with lithium-ion batteries with liquid electrolytes, all-solid-state batteries offer an attractive option owing to their potential in improving the safety and achieving both high power and high energy densities. Despite extensive research efforts, the development of all-solid-state batteries still falls short of expectation largely because of the lack of suitable candidate materials for the electrolyte required for practical applications. Here we report lithium superionic conductors with an exceptionally high conductivity (25 mS cm(-1) for Li9.54Si1.74P1.44S11.7Cl0.3), as well as high stability (similar to 0V versus Li metal for Li9.6P3S12). A fabricated all-solid-state cell based on this lithium conductor is found to have very small internal resistance, especially at 100 degrees C. The cell possesses high specific power that is superior to that of conventional cells with liquid electrolytes. Stable cycling with a high current density of 18C (charging/discharging in just three minutes; where C is the C-rate) is also demonstrated.