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Lithium intercalation properties of V205-based thin films and their application to thin film batteries

V2O5基薄膜的嵌锂性能及其在薄膜电池中的应用

基本信息

批准号：
10555299
负责人：
KUDO Tetsuichi
金额：
$ 3.26万
依托单位：
The university of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

项目摘要

Polymolybdovanadate(VィイD22ィエD20ィイD25ィエD2-MoOィイD23ィエD2) can intercalate lithium reversibly and perform as cathode of secondary battery. Moreover its film can be fabricated with ease. We built all solid state secondary batteries with films of polymolybdovanadate as cathode and tested for the purpose of evaluating the film cathode.Polymolybdovanadic acid was synthesized by the reaction of hydrogen peroxide water solution with a mixture of vanadium and molybdenum (V/Mo = 1/9). The acid thus obtained was spin-coated or cast on ITO glass substrate. Solid electrolyte (LiClOィイD24ィエD2/PEO-PPO) was prepared as following ; The mixture of 1M LiClOィイD24ィエD2/PC(propylene carbonate) and liquid monomer EO(ethylene oxide)/PPO(propylene oxide) was cast and polymerized by irradiation of UV ray. The mixing ratio of LiClOィイD24ィエD2/PC and EO/PPO was optimized to be 20 and 80wt%, respectively to give resultant higher conductivity and lower interracial resistance. The cathode and electrolyte, thus prepared, w … More ere pressed and integrated. All solid state cell,Li|LiClOィイD24ィエD2/PEO-PPO|VィイD22ィエD20ィイD25ィエD2-MoOィイD23ィエD2, ITOwas constructed using lithium metal as a counter electrode and sealed by epoxy resin.The cell with thin cathode (〜0.5μm) showed lower deterioration of battery capacity with increasing current density than one with thick cathode (〜5μm). The ratio of actual capacity to ideal one estimated by open circuit voltage measurements, however, did not depend on cathode thickness very much. This means that the cell with thick VィイD22ィエD20ィイD25ィエD2-MoOィイD23ィエD2 cathode may have effective high capacity due to increase in cathode quantity, even if suffer some degree of reduction. In this stage, the cell with 4.2 μm VィイD22ィエD20ィイD25ィエD2-MoOィイD23ィエD2 cathode performed with 10 μAcm-2 of capacity under 20 μAcm-2 of current density.The largest cause of the reduction of battery capacity is the interfacial resistance between electrolyte and cathode VィイD22ィエD20ィイD25ィエD2-MoOィイD23ィエD2 film. Thin film battery using VィイD22ィエD20ィイD25ィエD2-MoOィイD23ィエD2 film nay show still higher capacity, because we preliminary confirmed that such interracial resistance can be overcome by a certain device while cell construction. Less

聚钒酸盐（V_（22）O_（20）O_（25）O_（23）O_（24）O_（此外，它的膜可以容易地制造。以钒钼混合物（V/Mo = 1/9）与过氧化氢水溶液反应合成了聚钒酸（Polyvanadic acid，PVV）薄膜作为正极材料，制备了全固态二次电池，并对其性能进行了测试。将由此获得的酸旋涂或浇铸在ITO玻璃基板上。如下制备固体电解质（LiClO嵌段D24嵌段D2/PEO-PPO）：将IM LiClO嵌段D24嵌段D2/PC（碳酸丙烯酯）和液体单体EO（环氧乙烷）/PPO（环氧丙烷）的混合物浇铸并通过UV射线照射聚合。LiClO/D24/D2/PC和EO/PPO的混合比分别优化为20和80wt%，以获得更高的电导率和更低的界面电阻。由此制备的阴极和电解质， ...更多信息被压制和整合。全固态电池，Li| LiClO锂离子电池D24锂离子电池D2/PEO-PPO|以金属锂为对电极，环氧树脂封接，制备了V_（22）MoO_（23）ITO_（20）MoO_（25）D_2-MoO_（23）ITO_（22）ITO_（23）ITO_（23）电池，与厚阴极（0.5 μ m）相比，薄阴极（0.5 μ m）电池容量随电流密度的增大而降低。然而，通过开路电压测量估计的实际容量与理想容量的比率并不太依赖于阴极厚度。这意味着，具有厚V_（22）V_（20）V_（25）V_（22）-MoO_（23）V_（23）D_（22）阴极的电池由于阴极数量的增加，即使遭受某种程度的还原，也可以具有有效的高容量。在此阶段，以4.2 μ m V_（22）V_（20）V_（25）V_（22）V_（20）V_（25）V_（23）V_（23）V_（23）V_（22）V_（20）V_（25）V_（25）V_（23）V_（23）V_（23）V_（22）V_（20）V_（25）V_（25）V_（23）V_（23）D_（23）V_（23）V_（22）V_（20）V_（25）V_（25）V_（22）V_（23）V_（23）D_（23）V_（22）V_（22）V_（20）V_（25）V_（25）V_（23）V_（23）V_（23）采用V_（22）V_（20）V_（25）V_（22）V_（23）V_（25）V_（22）V_（23）D_（23）V_（25）V_（22）V_（23）D_（23）V_（少