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Journal of Semiconductors · 2023 ·Vol. 44 ·期 11 ·112701 · IF 5.1

Metallic few-layered 1T-VS2 nanosheets for enhanced sodium storage

Liang Wu,Peng Wang,Xingwu Zhai,Hang Wang,Wenqi Zhan,Xinfeng Tang,Qianwen Li,Min Zhou

Metallic few-layered 1T phase vanadium disulfide nanosheets have been employed for boosting sodium ion batteries. It can deliver a capacity of 241 mAhg−1 at 100 mAg−1 after 200 cycles. Such long-term stability is attributed to the facile ion diffusion and electron transport resulting from the well-designed two-dimensional (2D) electron-electron correlations among V atoms in the 1T phase and optimized in-planar electric transport. Our results highlight the phase engineering into electrode design for energy storage.

研究领域: 材料科学 · 能源存储

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ACS Applied Materials & Interfaces · 2024 · IF 8.3

1T-VS2@V2O3 Synergistic Nanoarchitecture-Based Lamellar Clusters as the High Conductivity Cathodes of Thermal Batteries

Xin-ya Bu,Yan-li Zhu,Cong-jie Wang,Wei Li,Yu Xia,Yong Zhao

Thermal batteries are solid-state, thermally activated batteries with long storage times and high reliability. FeS2 is used as a cathode material commonly, but the high internal resistance and low voltage platform limit the improvement of battery performance. Herein, the 1T-phase vanadium disulfide (VS2) is prepared via the scalable hydrothermal method and applied to thermal battery cathode materials for the first time. 1T-VS2 lamellar flower clusters have high electronic conductivity (1.583 S cm–1) at room temperature, which is 75 times higher than FeS2 (0.021 S cm–1). Mechanism analysis shows that 1T-VS2@V2O3 can be formed based on the part of 1T-VS2 being oxidized to V2O3 at the discharge temperature. Benefiting from the synergistic effect of vanadium sulfide and vanadium oxide as a cathode for thermal batteries enhanced specific capacity (292.4 mA h g–1) and mass energy density (572.5 W h kg–1) when cutoff voltage is 1 V. Additionally, the discharge results indicate that the cells utilizing 1T-VS2 cathodes provided a higher voltage platform of 2.11 V than 1.84 V for FeS2. This impressive work can offer a good strategy for boosting cathode materials for a high-performance thermal battery.

CAS / MDL: 7803-55-6

研究领域: 材料科学 · 电化学 · 能源存储

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Metallic few-layered 1T-VS2 nanosheets for enhanced sodium storage

1T-VS2@V2O3 Synergistic Nanoarchitecture-Based Lamellar Clusters as the High Conductivity Cathodes of Thermal Batteries