Zhang Miao, Lu Ruichao, Yuan Hongxin, Amin Kamran, Mao Lijuan, Yan Wei, Wei Zhixiang
CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience , National Center for Nanoscience and Technology , Beijing 100190 , P. R. China.
School of Energy and Power Engineering , Xi'an Jiaotong University , Xi'an 710049 , P. R. China.
ACS Appl Mater Interfaces. 2019 Jun 12;11(23):20873-20880. doi: 10.1021/acsami.9b05056. Epub 2019 May 28.
Although lithium metal is an ideal anode with high theoretical capacity, Li dendrite formation and volume change have limited its application. We report a vertical polyaniline nanowire-coated carbon nanotube (CNT/PANI) composite flexible electrode on which Li could be homogeneously deposited to obtain a CNT/PANI@Li anode. In the composite, CNT/PANI acted as a host matrix with well-distributed Li ion flux attributed to high electroactive surface area, thereby effectively suppressing the Li dendrite. Compared with the pure CNT electrode, the CNT/PANI electrode presented low overpotential and stable long-term cycling with much less fluctuant stripping/plating profiles. The potential application of CNT/PANI@Li in all-flexible full cells was demonstrated by combining flexible organic poly(2,5-dihydroxyl-1,4-benzoquinonyl sulfide)/carbon nanotube (PDHBQS/CNT) composite films, in which the cathode achieves an eminent performance of 120 mA h g at 50 mA g. Furthermore, pouch batteries with good flexibility were tested successfully, which demonstrated a promising future for all-flexible and high-performance Li-metal batteries.
尽管锂金属是一种具有高理论容量的理想阳极，但锂枝晶的形成和体积变化限制了其应用。我们报道了一种垂直聚苯胺纳米线包覆的碳纳米管（CNT/PANI）复合柔性电极，锂可以均匀地沉积在其上以获得CNT/PANI@Li阳极。在该复合材料中，CNT/PANI作为主体基质，由于具有高电活性表面积，锂离子通量分布良好，从而有效地抑制了锂枝晶。与纯CNT电极相比，CNT/PANI电极具有低过电位和稳定的长期循环性能，且剥离/镀覆曲线波动小得多。通过结合柔性有机聚（2,5-二羟基-1,4-苯醌硫化物）/碳纳米管（PDHBQS/CNT）复合膜，证明了CNT/PANI@Li在全柔性全电池中的潜在应用，其中阴极在50 mA g下实现了120 mA h g的优异性能。此外，成功测试了具有良好柔韧性的软包电池，这为全柔性和高性能锂金属电池展示了广阔的前景。
