Lithium batteries with new manganese oxide materials as lithium intercalation hosts
    3.
    发明授权
    Lithium batteries with new manganese oxide materials as lithium intercalation hosts 失效
    具有新型氧化锰材料的锂电池作为锂嵌入主机

    公开(公告)号:US06465129B1

    公开(公告)日:2002-10-15

    申请号:US09303309

    申请日:1999-04-30

    IPC分类号: H01M450

    摘要: Amorphous manganese dioxide cathodes for lithium batteries with lithium metal or other lithium-containing anodes, the cathode being synthesized by a sol-gel approach involving reduction of sodium permanganate with fumaric acid disodium salt carried out at room temperature to ensure an amorphous structure. The resulting amorphous manganese dioxide has a nanoporous structure and a high internal surface area of 350 m2/g. The amorphous manganese dioxide can electrochemically intercalate more than 1.6 moles of lithium per mole of manganese, and its theoretical capacity is 2 moles of lithium per mole of manganese. The host structure remains amorphous in the entire intercalation range and the intercalation process is reversible. Lithium battery cathodes comprising the amorphous manganese dioxide, a carbon powder and a binder provide a charge capacity in the level of 436 mAh/g and store energy at the level of 1056 mWh/g. Copper doped amorphous manganese oxides showed significant improvement in cycling performance.

    摘要翻译: 具有锂金属或其它含锂阳极的锂电池的无定形二氧化锰阴极,阴极通过溶胶 - 凝胶法合成,包括在室温下还原高锰酸钠与富马酸二钠盐,以确保无定形结构。 得到的无定形二氧化锰具有纳米多孔结构和350m 2 / g的高内表面积。 无定形二氧化锰可以每摩尔锰电化学插入超过1.6摩尔的锂,其理论容量是每摩尔锰2摩尔锂。 主体结构在整个嵌入范围内保持无定形,插层过程是可逆的。 包含无定形二氧化锰,碳粉和粘合剂的锂电池阴极提供了436mAh / g的电荷容量,并以1056mWh / g的水平存储能量。 铜掺杂的非晶态氧化锰显示出循环性能的显着改善。