摘要
Zinc(Zn)has been regarded as the most promising anodematerial for aqueous rechargeable batteries because of itshigh theoretical capacity(820 mA h g^(-1)),moderate elec-trochemical potential(-0.762 V vs.the standard hydro-gen electrode(SHE)),low cost and environmentalfriendliness[1-3].
本文报道了一种达到实际使用规格的水基可充电锌离子大电池,该电池以锰酸锂为正极材料、锌粉为负极材料,电流10 A时其能量密度可达80 W h kg^-1,成本低于0.4 RMB kg^-1.该电池体系使用一种专门开发的石墨-尼龙复合集流体作为正极集流体,该复合集流体具有耐腐蚀性强、重量轻、价格便宜的特点.通过向电解液中添加尿素的方法有效地抑制了锌枝晶生长.该电池在10 A电流下充放电400次,容量保留率达到90%.该电池可应用于电动自行车、混动汽车及其他储能领域.
基金
the National Key Research and Development Program of China(2016YFB0901503)
Jiangsu Province Natural Science Research of Universities(19KJB150025)
the National Natural Science Foundation of China(21875238 and 21831006)
Jiangsu Province Innovative and Entrepreneurial Doctor Project(KYQ19021 and KYQ19019)。
