MnO@氮掺杂多孔碳纳米复合物的制备及其锂离子存储性能

Preparation of MnO@N-doped Porous Carbon Nanocomposites and Their Application in LIBs

采用均苯三甲酸(BTC)和乙酸锰在水浴条件下制备Mn-BTC纳米线,然后分别在800℃条件下,在氩气和氨气保护气氛中进行退火处理,形成MnO@多孔碳纳米复合物和MnO@氮掺杂多孔碳纳米复合物;MnO@氮掺杂多孔碳纳米复合物在锂离子储存中展现出优异的电化学性能,多孔碳能够有效缓解氧化锰在锂化过程中的体积膨胀问题,此外,氮掺杂能够有效提高多孔碳的导电性,并增加储锂的电化学活性位点,进一步增加了电化学储锂性能。

Mn-BTC nanowires were prepared by trimesic acid (BTC) and manganese acetate in water bath, then annealed in argon and ammonia atmosphere at 800℃ to form MnO @ porous carbon nanocomposites and MnO @ nitrogen-doped porous carbon nanocomposites. MnO @ nitrogen-doped porous carbon nanocomposites exhibited excellent electrochemical properties in lithium ion storage. Porous carbon can effectively alleviate the volume expansion of manganese oxide during lithification. In addition, nitrogen doping can effectively improve the conductivity of porous carbon and increase the electrochemical active sites of lithium storage, which further increases the performance of electrochemical lithium storage.