Novel Composite Separators Based on Heterometallic Metal‐Organic Frameworks Improve the Performance of Lithium‐Ion Batteries

The separator is an essential component of lithium‐ion batteries as it affects ion transport and safety performance. Herein, a novel class of separators fabricated from poly(vinyl alcohol) and heterometallic metal‐organic frameworks, which affords a higher density of open bimetal sites, stronger com...

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Bibliographic Details
Published in:Advanced energy materials 2023-06, Vol.13 (22), p.n/a
Main Authors: Yu, Wen, Shen, Li, Lu, Xing, Han, Jianming, Geng, Nankun, Lai, Chunyan, Xu, Qunjie, Peng, Yiting, Min, YuLin, Lu, Yunfeng
Format: Article
Language:English
Subjects:
Bimetals
composite separators
electrospinning
heterometallic metal‐organic frameworks
Ion transport
Li+ transference number
Lithium-ion batteries
Performance enhancement
Polyvinyl alcohol
Separators
Thermal stability
Wettability
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Summary:The separator is an essential component of lithium‐ion batteries as it affects ion transport and safety performance. Herein, a novel class of separators fabricated from poly(vinyl alcohol) and heterometallic metal‐organic frameworks, which affords a higher density of open bimetal sites, stronger complexation with anions, more porous structure, and enhanced thermal stability and electrolyte wettability is reported. The adoption of such separators substantially increases lithium‐ion conductivity and lithium‐ion transference number, leading to batteries with prolonged lifespan, improved low‐temperature performance, and enhanced rate performance. Composite separators based on heterometallic metal‐organic frameworks (MOFs) are developed for lithium‐ion batteries, affording high lithium‐ion transference number and conductivity, and resulting in batteries with significantly improved rate performance, cycling lifespan, and low‐temperature performance.
ISSN:1614-6832
1614-6840
DOI:10.1002/aenm.202204055