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Title: Deep cycling for high‐capacity Li‐ion batteries
Authors: Xia, Huarong
Tang, Yuxin
Malyi, Oleksandr I.
Zhu, Zhiqiang
Zhang, Yanyan
Zhang, Wei
Ge, Xiang
Zeng, Yi
Chen, Xiaodong
Keywords: Engineering::Materials::Energy materials
Science::Chemistry::Physical chemistry::Electrochemistry
Issue Date: 2021
Source: Xia, H., Tang, Y., Malyi, O. I., Zhu, Z., Zhang, Y., Zhang, W., Ge, X., Zeng, Y. & Chen, X. (2021). Deep cycling for high‐capacity Li‐ion batteries. Advanced Materials, 33(10), 2004998-.
Project: NRF2015_IIP003_004
Journal: Advanced Materials 
Abstract: As the practical capacity of conventional Li‐ion batteries (LIBs) approaches the theoretical limit, which is determined by the rocking‐chair cycling architecture, a new cycling architecture with higher capacity is highly demanded for future development and electronic applications. Here, a deep‐cycling architecture intrinsically with a higher theoretical capacity limit than conventional rocking‐chair cycling architecture is developed, by introducing a follow‐up cycling process to contribute more capacity. The deep‐cycling architecture makes full use of movable ions in both of the electrolyte and electrodes for energy storage, rather than in either the electrolyte or the electrodes. Taking LiMn2O4‐mesocarbon microbeads (MCMB)/Li cells as a proof‐of‐concept, 57.7% more capacity is obtained. Moreover, the capacity retention is as high as 84.4% after 2000 charging/discharging cycles. The deep‐cycling architecture offers opportunities to break the theoretical capacity limit of conventional LIBs and makes high demands for new‐type of cathode materials, which will promote the development of next‐generation energy storage devices.
ISSN: 1521-4095
DOI: 10.1002/adma.202004998
Rights: © 2021 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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