Polydopamine-coated cellulose microfibrillated membrane as high performance lithium-ion battery separator
Polydopamine-coated cellulose microfibrillated membrane as high performance lithium-ion battery separator
复制标题
DOI：
10.1039/c3ra45879b
复制
发表时间：
2014-01
期刊：
影响因子：
3.9
通讯作者：
Quan Xu;Quan Xu;Q. Kong;Zhihong Liu;Jian-jun Zhang;Xuejiang Wang;Rongzhan Liu;Liping Yue;G. Cui
中科院分区：
文献类型：
--
作者：
Quan Xu;Quan Xu;Q. Kong;Zhihong Liu;Jian-jun Zhang;Xuejiang Wang;Rongzhan Liu;Liping Yue;G. Cui
通过受贻贝启发的聚多巴胺涂层对环保纤维素微纤维进行改性，并通过简便且经济高效的造纸工艺制造纤维素/聚多巴胺（CPD）膜。结果表明，CPD膜具有致密的多孔结构、优异的机械强度和优异的热尺寸稳定性。 CPD膜以其优越的机械强度、低成本和良好的电化学性能被探索作为锂离子电池隔膜。与商业化的聚丙烯隔膜和原始纤维素隔膜相比，使用 CPD 隔膜的钴酸锂/石墨电池表现出最佳的循环稳定性和倍率性能。此外，带有 CPD 隔膜的电池的交流阻抗在第 100 次循环后呈现出 9 Ω 的微小变化，表明电池具有出色的界面稳定性。这些优异的性能使得 CPD 膜作为高性能锂离子电池隔膜具有非常有前景的应用。
Eco-friendly cellulose microfibers were modified by mussel-inspired polydopamine coating layer and a cellulose/polydopamine (CPD) membrane was fabricated by a facile and cost-effective papermaking process. It was demonstrated that CPD membrane possessed a compact porous structure, superior mechanical strength and excellent thermal dimensional stability. CPD membrane was explored as a lithium-ion battery separator with its superior mechanical strength, low-cost and favorable electrochemical properties. Lithium cobalt oxide/graphite cell using CPD separator displayed the best cycling stability and rate capability compared with those of commercialized polypropylene separator and pristine cellulose separator. Furthermore, alternating-current impedance of the cell with CPD separator presented minor variation of 9 Ω after the 100th cycle indicating an excellent interfacial stability of the cell. These excellent performances could endow CPD membrane as a very promising application as a high performance lithium-ion battery separator.