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231226s2024 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202308656
|2 doi
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|a pubmed24n1248.xml
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|a (DE-627)NLM364475099
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|a (NLM)37955857
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|a DE-627
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|a eng
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|a Yan, Yawen
|e verfasserin
|4 aut
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|a One-Step Surface-to-Bulk Modification of High-Voltage and Long-Life LiCoO2 Cathode with Concentration Gradient Architecture
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|c 2024
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|a Text
|b txt
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Revised 04.01.2024
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2023 Wiley-VCH GmbH.
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|a Raising the charging cut-off voltage of layered oxide cathodes can improve their energy density. However, it inevitably introduces instabilities regarding both bulk structure and surface/interface. Herein, exploiting the unique characteristics of high-valence Nb5+ element, a synchronous surface-to-bulk-modified LiCoO2 featuring Li3 NbO4 surface coating layer, Nb-doped bulk, and the desired concentration gradient architecture through one-step calcination is achieved. Such a multifunctional structure facilitates the construction of high-quality cathode/electrolyte interface, enhances Li+ diffusion, and restrains lattice-O loss, Co migration, and associated layer-to-spinel phase distortion. Therefore, a stable operation of Nb-modified LiCoO2 half-cell is achieved at 4.6 V (90.9% capacity retention after 200 cycles). Long-life 250 Wh kg-1 and 4.7 V-class 550 Wh kg-1 pouch cells assembled with graphite and thin Li anodes are harvested (both beyond 87% after 1600 and 200 cycles). This multifunctional one-step modification strategy establishes a technological paradigm to pave the way for high-energy density and long-life lithium-ion cathode materials
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|a Journal Article
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|a bulk doping
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|a concentration gradient design
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|a high-voltage LiCoO2
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|a one-step synthesis
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|a surface coating
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|a Fang, Qiu
|e verfasserin
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|a Kuai, Xiaoxiao
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|a Zhou, Shiyuan
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|a Chen, Jianken
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|a Zhang, Haitang
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|a Wu, Xiaohong
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|a Zeng, Guifan
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|a Wu, Zixin
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|a Zhang, Baodan
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|a Tang, Yonglin
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|a Zheng, Qizheng
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|a Liao, Hong-Gang
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|a Dong, Kang
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|a Manke, Ingo
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|a Wang, Xuefeng
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|a Qiao, Yu
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|a Sun, Shi-Gang
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 36(2024), 1 vom: 02. Jan., Seite e2308656
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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|g volume:36
|g year:2024
|g number:1
|g day:02
|g month:01
|g pages:e2308656
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|u http://dx.doi.org/10.1002/adma.202308656
|3 Volltext
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