@article{Zhang2018, 
author = {Anyi Zhang and Xin Fang and Chenfei Shen and Yihang Liu and In Gi Seo and Yuqiang Ma and Liang Chen and Patrick Cottingham and Chongwu Zhou},
title = {Functional interlayer of PVDF-HFP and carbon nanofiber for long-life lithium-sulfur batteries},
year = {2018},
journal = {Nano Research},
volume = {11},
number = {6},
pages = {3340-3352},
keywords = {lithium-sulfur batteries, carbon nanofiber, poly(vinylidene fluorideco-hexafluoropropylene) (PVDF-HFP), gel polymer electrolyte, conductive network},
url = {https://www.sciopen.com/article/10.1007/s12274-017-1929-0},
doi = {10.1007/s12274-017-1929-0},
abstract = {In the present work, we develop a scalable and inexpensive design for lithium-sulfur (Li-S) batteries by capping a flexible gel polymer/carbon nanofiber (CNF)composite membrane onto a free-standing and binder-free CNF + Li2S6 cathode, thus achieving a three-dimensional (3D) structural design. The CNF network is used as the current collector and S holder to overcome the insulating nature and volume expansion of S, while the composite membrane comprises a gel polymer poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP), and CNF additive is used as an interlayer to trap polysulfides and recycle the remaining S species, leading to a high specific capacity and long cycle life. This 3D structure enables excellent cyclability for 500 cycles at 0.5 ℃ with a small capacity decay of 0.092% per cycle. Furthermore, an outstanding cycle stability was also achieved at even higher current densities (1.0 to 2.0 ℃), indicating its good potential for practical applications of Li-S batteries.}
}