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<p>Based on the safety concerns and expected high-energy density, all-solid-state lithium batteries (ASSLBs) are in a good position to replace current lithium-ion batteries (LIBs). However, the technological evolution of electrode materials to contend with those of LIBs employing liquid electrolytes is still limited owing to the lack of functionality in terms of capacity retention, rate capability, and cycling endurance of cathode materials in ASSLBs. Two-dimensional (2D) transition-metal dichalcogenides show outstanding potential as cathodes in LIBs owing to their distinctive physiochemical properties. In this study, 2D WSe<sub>2</sub> is prepared via solution phase method followed by sintering route and is further used as cathode material in ASSLB (Li/75%Li<sub>2</sub>S-24%P<sub>2</sub>S<sub>5</sub>1%P<sub>2</sub>O<sub>5</sub>/Li<sub>10</sub>GeP<sub>2</sub>S<sub>12</sub>/WSe<sub>2</sub>). WSe<sub>2</sub> demonstrates a substantial reversible capacity of 309.3&#xa0;mAh&#xa0;g<sup>−1</sup> following 400 cycles at 100&#xa0;mA&#xa0;g<sup>−1</sup>, whereas the ASSLBs maintain an impressive gravimetric energy density of 447.3&#xa0;Wh&#xa0;kg⁻<sup>1</sup> along with volumetric energy densities of and 651.2&#xa0;Wh&#xa0;L⁻<sup>1</sup>, over the same cycling period. The endurance of very long cycles is attributed to the well-developed layered two-dimensional structure and good electronic conductivity of WSe<sub>2</sub>. Additionally, the reaction mechanism, electrochemical reaction kinetics as well as capacity contributions are further analyzed.</p>

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All-solid-state lithium battery enabled by two-dimensional tungsten diselenide cathode with long cycle performance

  • 期刊论文

  • 发表日期：

    2026年1月18日

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  • Majed YA Almashnowi,
  • Muneerah Alomar,
  • Mohsenah H. J. Mashniwi,
  • Mohammad Alamgir Hossain,
  • A. M. Fathy,
  • Muhammad Shahid Rashid

摘要

Based on the safety concerns and expected high-energy density, all-solid-state lithium batteries (ASSLBs) are in a good position to replace current lithium-ion batteries (LIBs). However, the technological evolution of electrode materials to contend with those of LIBs employing liquid electrolytes is still limited owing to the lack of functionality in terms of capacity retention, rate capability, and cycling endurance of cathode materials in ASSLBs. Two-dimensional (2D) transition-metal dichalcogenides show outstanding potential as cathodes in LIBs owing to their distinctive physiochemical properties. In this study, 2D WSe2 is prepared via solution phase method followed by sintering route and is further used as cathode material in ASSLB (Li/75%Li2S-24%P2S51%P2O5/Li10GeP2S12/WSe2). WSe2 demonstrates a substantial reversible capacity of 309.3 mAh g−1 following 400 cycles at 100 mA g−1, whereas the ASSLBs maintain an impressive gravimetric energy density of 447.3 Wh kg⁻1 along with volumetric energy densities of and 651.2 Wh L⁻1, over the same cycling period. The endurance of very long cycles is attributed to the well-developed layered two-dimensional structure and good electronic conductivity of WSe2. Additionally, the reaction mechanism, electrochemical reaction kinetics as well as capacity contributions are further analyzed.