Nanodiamond-Enhanced Nanofiber Separators for High-Energy Lithium-Ion Batteries.
Aashray NarlaWenbin FuAlp KulaksizogluAtsushi KumeBilly R JohnsonAshwin Sankara RamanFujia WangAlexandre MagasinskiDoyoub KimMohammed KousaYiran XiaoSamik JhulkiKostiantyn TurcheniukGleb YushinPublished in: ACS applied materials & interfaces (2023)
Current lithium-ion battery separators made from polyolefins such as polypropylene and polyethylene generally suffer from low porosity, low wettability, and slow ionic conductivity and tend to perform poorly against heat-triggering reactions that may cause potentially catastrophic issues, such as fire. To overcome these limitations, here we report that a porous composite membrane consisting of poly(vinylidene fluoride- co -hexafluoropropylene) nanofibers functionalized with nanodiamonds (NDs) can realize a thermally resistant, mechanically robust, and ionically conductive separator. We critically reveal the role of NDs in the polymer matrix of the membrane to improve the thermal, mechanical, crystalline, and electrochemical properties of the composites. Taking advantages of these characteristics, the ND-functionalized nanofiber separator enables high-capacity and stable cycling of lithium cells with LiNi 0.8 Mn 0.1 Co 0.1 O 2 (NMC811) as the cathode, much superior to those using conventional polyolefin separators in otherwise identical cells.
Keyphrases
- induced apoptosis
- cell cycle arrest
- reduced graphene oxide
- solid state
- gold nanoparticles
- molecularly imprinted
- ionic liquid
- quantum dots
- endoplasmic reticulum stress
- drinking water
- room temperature
- dna methylation
- oxidative stress
- signaling pathway
- single cell
- gene expression
- genome wide
- cell death
- heat stress
- cell proliferation
- metal organic framework