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High-Performance Li-SeS x All-Solid-State Lithium Batteries

Li, Xiaona ; Liang, Jianwen ; Luo, Jing ; Wang, Changhong ; Li, Xia ; Sun, Qian ; Li, Ruying ; Zhang, Li ; Yang, Rong ; Lu, Shigang ; Huang, Huan ; Sun, Xueliang

Advanced materials (Weinheim), 2019-04, Vol.31 (17), p.e1808100 [Periódico revisado por pares]

Germany

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  • Título:
    High-Performance Li-SeS x All-Solid-State Lithium Batteries
  • Autor: Li, Xiaona ; Liang, Jianwen ; Luo, Jing ; Wang, Changhong ; Li, Xia ; Sun, Qian ; Li, Ruying ; Zhang, Li ; Yang, Rong ; Lu, Shigang ; Huang, Huan ; Sun, Xueliang
  • É parte de: Advanced materials (Weinheim), 2019-04, Vol.31 (17), p.e1808100
  • Descrição: All-solid-state Li-S batteries are promising candidates for next-generation energy-storage systems considering their high energy density and high safety. However, their development is hindered by the sluggish electrochemical kinetics and low S utilization due to high interfacial resistance and the electronic insulating nature of S. Herein, Se is introduced into S cathodes by forming SeS solid solutions to modify the electronic and ionic conductivities and ultimately enhance cathode utilization in all-solid-state lithium batteries (ASSLBs). Theoretical calculations confirm the redistribution of electron densities after introducing Se. The interfacial ionic conductivities of all achieved SeS -Li PS (x = 3, 2, 1, and 0.33) composites are 10 S cm . Stable and highly reversible SeS cathodes for sulfide-based ASSLBs can be developed. Surprisingly, the SeS /Li GeP S -Li PS /Li solid-state cells exhibit excellent performance and deliver a high capacity over 1100 mAh g (98.5% of its theoretical capacity) at 50 mA g and remained highly stable for 100 cycles. Moreover, high loading cells can achieve high areal capacities up to 12.6 mAh cm . This research deepens the understanding of Se-S solid solution chemistry in ASSLB systems and offers a new strategy to achieve high-performance S-based cathodes for application in ASSLBs.
  • Editor: Germany
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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