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Lee, Hyun-Wook
Energy Storage and Electron Microscopy Laboratory
Research Interests
  • Energy storage, secondary batteries, transmission electron microscopy, real time analysis

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The Role of Polymer and Inorganic Coatings to Enhance Interparticle Connections Diagnosed by In Situ Techniques

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Title
The Role of Polymer and Inorganic Coatings to Enhance Interparticle Connections Diagnosed by In Situ Techniques
Author
Li, ShihengWi, Tae-UngJi, MinCui, ZhiyangLee, Hyun-WookLu, Zhenda
Issue Date
2021-02
Publisher
AMER CHEMICAL SOC
Citation
NANO LETTERS, v.21, no.3, pp.1530 - 1537
Abstract
Surface coating on alloy anodes renders an effective remedy to tolerate internal stress and alleviate the side reaction with electrolytes for long-lasting reversible lithium redox reactions in lithium-ion batteries. However, the role of surface coating on the interparticle connections of alloy anodes remains not fully understood. Herein, we exploit real-time lithiation and mechanic measurement of SnO2 nanoparticles via in situ TEM with different coating layers, including conducting polymer polypyrrole and metal oxide MnO2. As a result, polypyrrole is more flexible to accommodate the volume expansion issue. More importantly, the polypyrrole coating layers offer a large contact area and strong adhesion force between the SnO2 nanoparticles, ensuring fast lithiation kinetics and high cycling stability. These observations provide new insight into how the interparticle connections of alloy anodes with diverse coating approaches can impact battery performance, shedding light on the practical processing of the alloy anode materials for high-energy Li-ion batteries.
URI
https://scholarworks.unist.ac.kr/handle/201301/52544
URL
https://pubs.acs.org/doi/10.1021/acs.nanolett.0c05035
DOI
10.1021/acs.nanolett.0c05035
ISSN
1530-6984
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