Electrospun of polyvinyl alcohol composite hydrogel nanofibers prepared by in-situ polymerization: A novel approach to fabricate hydrogel nanofiber membrane for lithium-ion batteries

Dou, Yun; Wang, Shoujuan; Gibril, Magdi E.; Kong, Fangong

doi:10.1016/j.cej.2023.148435

Cited by 4 publications

(1 citation statement)

References 64 publications

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“…According to the contact-angle testing results in Figure 2a,b, the electrolyte on the MCP/PVA hybrid separator exhibits a much smaller contact angle of ~22° compared with that of commercial PP separators (~43°). As shown in Figure S2, the electrolyte contact angle on the pure PVA membrane was measured to be ~23°, which suggests that the improved electrolyte wettability was mainly due to the PVA network [29,33]. The high electrolyte affinity of the hybrid separator can be ascribed to the abundance of hydroxyl groups in PVA chains, which have strong interactions with the…”

Section: Electrolyte Wettabilitymentioning

confidence: 95%

Electrospun MoS2-CNTs-PVA/PVA Hybrid Separator for High-Performance Li/FeS2 Batteries

Wu,

Liu,

Zhang

et al. 2024

Polymers

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As a promising candidate for high-energy-density rechargeable lithium metal batteries, Li/FeS2 batteries still suffer from the large volume change and severe shuttle effect of lithium polysulfides during cycling. To improve the electrochemical performance, great efforts have been made to modify FeS2 cathodes by constructing various nanocomposites. However, energy density is sacrificed, and these materials are not applicable at a large scale. Herein, we report that the electrochemical performance of commercial FeS2 can be greatly enhanced with the application of a double-layer MoS2-CNTs-PVA (MCP)/PVA separator fabricated by electrospinning. The assembled Li/FeS2 batteries can still deliver a high discharge capacity of 400 mAh/g after 200 cycles at a current density of 0.5 C. The improved cycling stability can be attributed to the strong affinity towards lithium polysulfides (LiPSs) of the hydroxyl-rich PVA matrix and the unique double-layer structure, in which the bottom layer acts as an electrical insulation layer and the top layer coupled with MoS2/CNTs provides catalytic sites for LiPS conversion.

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Section: Electrolyte Wettabilitymentioning

confidence: 95%