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Comparative study of simple and concentration gradient shell coatings with Li1.2Ni0.13Mn0.54Co0.13O2 on LiNi0.8Mn0.1Co0.1O2 cathodes for lithium-ion batteries
Ma, Fei1,2; Wu, Yinghong1,2; Wei, Guangye1; Qiu, Shufeng3; Qu, Jingkui1; Qi, Tao1
2019-11-05
Source PublicationSOLID STATE IONICS
ISSN0167-2738
Volume341Pages:10
AbstractLi- and Mn-rich materials have high capacities but serious voltage attenuation, whereas Ni-rich materials LiNi0.8Co0.1Mn0.1O2 (NCM) have good rate characteristics but poor stabilities, and they readily to oxidize organic electrolytes. The core-shell strategy with Ni-rich materials as the core and Li- and Mn-rich materials as the shell was expected to balance these merits and drawbacks. In this work, simple and concentration-gradient Li- and Mn-rich shell were successfully synthesized on NCM and critically compared. As expected, a distinct core-shell interface was observed for the simple core-shell cathode, which causes the shell to crack during cycling and exhibits worse electrochemical performance than the single Li- and Mn-rich cathodes and Ni-rich cathodes. In contrast, the fabricated concentration-gradient core-shell cathode shows the uniform fusion of the core and shell at the atomic level, and the overall electrochemical performance is far superior to that of the simple core-shell and pristine cathodes. In addition, it delivers an initial reversible capacity of 226.6 mAh g(-1) at a C-rate of 0.1C and 120.2 mAh g(-1) at 10.0C, and it retains 86.9% of its capacity after 100 cycles to 4.6 V at 1.0C. Differential capacity versus potential (dQ/dV versus V) and EIS analyses show that the concentration-gradient core-shell cathode has a stable impedance and very stable average voltage. Obviously, the concentration-gradient coating of the Li- and Mn-rich shell can maximize the merits of the core and shell.
KeywordLi- and Mn-rich materials Concentration gradient Ni-rich materials Core-shell Lithium-ion battery
DOI10.1016/j.ssi.2019.115034
Language英语
WOS KeywordLAYERED OXIDE CATHODES ; HIGH-ENERGY ; ELECTROCHEMICAL PERFORMANCE ; POSITIVE ELECTRODE ; HIGH-CAPACITY ; SURFACE MODIFICATION ; RICH ; LI ; LINI0.8CO0.1MN0.1O2 ; AL2O3
Funding ProjectScience and Technology Service Network Plan of the Chinese Academy of Sciences[KFJ-STS-ZDTP-040] ; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences[QYZDJ-SSW-JSC021] ; Key Research Program of the Chinese Academy of Sciences[ZDRW-ZS-2018-1]
WOS Research AreaChemistry ; Physics
WOS SubjectChemistry, Physical ; Physics, Condensed Matter
Funding OrganizationScience and Technology Service Network Plan of the Chinese Academy of Sciences ; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences
WOS IDWOS:000495479700005
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/39149
Collection中国科学院过程工程研究所
Corresponding AuthorQu, Jingkui
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Dept Chem Engn, Beijing 100190, Peoples R China
3.Hangzhou Zhonghao Technol Co Ltd, Hangzhou 310000, Zhejiang, Peoples R China
Recommended Citation
GB/T 7714
Ma, Fei,Wu, Yinghong,Wei, Guangye,et al. Comparative study of simple and concentration gradient shell coatings with Li1.2Ni0.13Mn0.54Co0.13O2 on LiNi0.8Mn0.1Co0.1O2 cathodes for lithium-ion batteries[J]. SOLID STATE IONICS,2019,341:10.
APA Ma, Fei,Wu, Yinghong,Wei, Guangye,Qiu, Shufeng,Qu, Jingkui,&Qi, Tao.(2019).Comparative study of simple and concentration gradient shell coatings with Li1.2Ni0.13Mn0.54Co0.13O2 on LiNi0.8Mn0.1Co0.1O2 cathodes for lithium-ion batteries.SOLID STATE IONICS,341,10.
MLA Ma, Fei,et al."Comparative study of simple and concentration gradient shell coatings with Li1.2Ni0.13Mn0.54Co0.13O2 on LiNi0.8Mn0.1Co0.1O2 cathodes for lithium-ion batteries".SOLID STATE IONICS 341(2019):10.
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