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Sub‐10 nm V2O5 Crystals on Carbon Nanosheets for Advanced All‐Solid‐State Lithium Metal Batteries
Particle & Particle Systems Characterization ( IF 2.7 ) Pub Date : 2020-07-26 , DOI: 10.1002/ppsc.202000164 Liwei Su 1 , Linhui Liu 1 , Jinpei Hei 1 , Huan Chen 1 , Lianbang Wang 1 , Yuanhao Wang 2 , Manman Ren 3
Particle & Particle Systems Characterization ( IF 2.7 ) Pub Date : 2020-07-26 , DOI: 10.1002/ppsc.202000164 Liwei Su 1 , Linhui Liu 1 , Jinpei Hei 1 , Huan Chen 1 , Lianbang Wang 1 , Yuanhao Wang 2 , Manman Ren 3
Affiliation
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.
中文翻译:
碳纳米板上的亚10纳米V2O5晶体,用于高级全固态锂金属电池
V 2 O 5作为一种无锂的阴极材料,具有固有的缺陷,例如动力学迟缓和体积变化,同时还需要锂金属阳极,该阳极易于在液体电解质中形成树枝状晶体。树枝状锂和易燃的电解质溶剂都带来长期的安全问题。这项工作引入了不可燃的无机-有机复合固体电解质,以抑制锂枝晶的生长并抑制由V 2 O 5纳米化引起的不稳定性。但是,即使将V 2 O 5尺寸减小到约50 nm ,长期循环和速率性能仍然不足。作为改进,低于10 nm V 2 O 5通过简单的浸渍和煅烧过程,以玉米秸秆为前体设计和制备/ C纳米片。在无机-有机复合固体电解质中,V 2 O 5 / C提供的电极/电解质接触和界面稳定性要比本体V 2 O 5和商用V 2 O 5好得多。50次循环后在0.1 C下的放电容量为228 mAh g -1,在2.0 C下的放电容量为≈110mAh g -1。
更新日期:2020-07-26
中文翻译:
碳纳米板上的亚10纳米V2O5晶体,用于高级全固态锂金属电池
V 2 O 5作为一种无锂的阴极材料,具有固有的缺陷,例如动力学迟缓和体积变化,同时还需要锂金属阳极,该阳极易于在液体电解质中形成树枝状晶体。树枝状锂和易燃的电解质溶剂都带来长期的安全问题。这项工作引入了不可燃的无机-有机复合固体电解质,以抑制锂枝晶的生长并抑制由V 2 O 5纳米化引起的不稳定性。但是,即使将V 2 O 5尺寸减小到约50 nm ,长期循环和速率性能仍然不足。作为改进,低于10 nm V 2 O 5通过简单的浸渍和煅烧过程,以玉米秸秆为前体设计和制备/ C纳米片。在无机-有机复合固体电解质中,V 2 O 5 / C提供的电极/电解质接触和界面稳定性要比本体V 2 O 5和商用V 2 O 5好得多。50次循环后在0.1 C下的放电容量为228 mAh g -1,在2.0 C下的放电容量为≈110mAh g -1。