Sub-10 nm V2O5 Crystals on Carbon Nanosheets for Advanced All-Solid-State Lithium Metal Batteries |
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| Authors: | Liwei Su Linhui Liu Jinpei Hei Huan Chen Lianbang Wang Yuanhao Wang Manman Ren |
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| Institution: | 1. State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014 China;2. SUSTech Engineering Innovation Center, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055 China;3. Institute of Materials Science and Engineering, Qilu University of Technology, Jinan, 250353 China |
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| Abstract: | V2O5, as a lithium-free cathode material, has inherent defects such as sluggish kinetics and volume change and, at the same time, requires a lithium metal anode that tends to form dendrites in liquid electrolytes. Both the lithium dendrite and the flammable electrolyte solvent bring longtime safety issues. This work introduces nonflammable inorganic–organic composite solid electrolyte to inhibit the growth of the lithium dendrite and suppress the instability caused by V2O5 nanometerization. However, the long-term cycling and rate performances are still insufficient even when reducing V2O5 size to about 50 nm. As an improvement, sub-10 nm V2O5/C nanosheets are designed and prepared using corn stalks as precursors through simple impregnation and calcination process. The V2O5/C offers a much better electrode/electrolyte contact and interface stability than bulk V2O5 and commercial V2O5 in the inorganic–organic composite solid electrolyte. The discharge capacity is 228 mAh g−1 at 0.1 C after 50 cycles and ≈110 mAh g−1 at 2.0 C. |
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| Keywords: | carbon nanosheets lithium metal batteries nanocrystals solid-state electrolytes vanadium oxides |
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