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High-Performance Lithiated SiOx Anode Obtained by a Controllable and Efficient Prelithiation Strategy
Meng, Qinghai; Li, Ge; Yue, Junpei; Xu, Quan; Yin, Ya-Xia; Guo, Yu-Guo
2019-09-04
Source PublicationACS APPLIED MATERIALS & INTERFACES
ISSN1944-8244
Volume11Issue:35Pages:32062-32068
AbstractSilicon-based electrodes are promising and appealing for futuristic Li-ion batteries because of their high theoretical specific capacity. However, massive volume change of silicon upon lithiation and delithiation, accompanied by continual formation and destruction of the solid-electrolyte interface (SEI), leads to low Coulombic efficiency. Prelithiation of Si-based anode is regarded as an effective way for compensating for the loss of Li+ in the first discharging process. Here, a high-performance lithiated SiOx anode was prepared by using a controllable, efficient, and novel prelithiation strategy. The lithiation of SiOx is homogeneous and efficient in bulk due to well-improved Li+ diffusion in SiOx. Moreover, the in situ formed SEI during the process of prelithiation reduces the irreversible capacity loss in the first cycle and thus improves the initial Coulombic efficiency (ICE). Half-cells and full cells based on the as-prepared lithiated SiOx anode prominently increase the ICE from 79 to 89% and 68 to 87%, respectively. It is worth mentioning that the homogeneously lithiated SiOx anode achieves stable 200 cycles in NCM622//SiOx coin full cells. These exciting results provide applicable prospects of lithiated SiOx anode in the next-generation high-energy-density Li-ion batteries.
DOI10.1021/acsami.9b12086
Indexed BySCI
Language英语
WOS IDWOS:000484831100051
EI Accession Number1944-8252
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/82608
Collection中国科学院化学研究所
AffiliationChinese Acad Sci, Inst Chem, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Meng, Qinghai,Li, Ge,Yue, Junpei,et al. High-Performance Lithiated SiOx Anode Obtained by a Controllable and Efficient Prelithiation Strategy[J]. ACS APPLIED MATERIALS & INTERFACES,2019,11(35):32062-32068.
APA Meng, Qinghai,Li, Ge,Yue, Junpei,Xu, Quan,Yin, Ya-Xia,&Guo, Yu-Guo.(2019).High-Performance Lithiated SiOx Anode Obtained by a Controllable and Efficient Prelithiation Strategy.ACS APPLIED MATERIALS & INTERFACES,11(35),32062-32068.
MLA Meng, Qinghai,et al."High-Performance Lithiated SiOx Anode Obtained by a Controllable and Efficient Prelithiation Strategy".ACS APPLIED MATERIALS & INTERFACES 11.35(2019):32062-32068.
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