Boosting Cell Performance of LiNi0.8Co0.15A0.05O2 via Surface Structure Design
Abstract
Although the high energy density and environmental benignancy of LiNi0.8Co0.15A0.05O2 (NCA) holds promise for use as cathode material in Li-ion batteries, present low rate capabilities, and fast capacity fade limit its broad commercial applications. Here, it is reported that surface modification of NCA cathode (R-3m) with 5 nm-thick nanopillar layers and Fm-3m structures significantly improves electrode structure, morphology, and electrochemical performance. The formation of nanopillar layers increases cycling and working voltage stability of NCA by shielding the host material from hydrofluoric acid and improves structural stability with the electrolyte. The modified NCA cathode exhibits an enhanced 89% capacity retention at a rate of 1 C over that of pristine NCA (75.2%) after 150 cycles and effectively suppresses working voltage fade (a drop of 0.025 V after 300 cycles) during repeated charge-discharge cycles. In addition, the diffusion barrier of Li ions in NCA crystals at 0.80 V is noticeably smaller than that of Li ions in pristine NCA (0.87 eV). These findings demonstrate that this unique surface structure design considerably enhances cycle and rate performance of NCA, which has potential applications in other Ni-rich layered cathode materials.
- Authors:
-
- Central South Univ., Changsha(China); National Engineering Lab. for High Efficiency Recovery of Refractory Nonferrous Metals, Changsha (China)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Publication Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- OSTI Identifier:
- 1602539
- Alternate Identifier(s):
- OSTI ID: 1579424
- Grant/Contract Number:
- AC02-06CH11357; AC02‐06CH11357
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Small
- Additional Journal Information:
- Journal Volume: 15; Journal Issue: 50; Journal ID: ISSN 1613-6810
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 25 ENERGY STORAGE; LiNi0.8Co0.15A0.05O2; Lithium ion battery; Cathode material; Structure design; electrochemical performance
Citation Formats
Zheng, Junchao, Yang, Zhuo, Dai, Alvin, Tang, Linbo, Wei, Hanxin, Li, Yunjiao, He, Zhenjiang, and Lu, Jun. Boosting Cell Performance of LiNi0.8Co0.15A0.05O2 via Surface Structure Design. United States: N. p., 2019.
Web. doi:10.1002/smll.201904854.
Zheng, Junchao, Yang, Zhuo, Dai, Alvin, Tang, Linbo, Wei, Hanxin, Li, Yunjiao, He, Zhenjiang, & Lu, Jun. Boosting Cell Performance of LiNi0.8Co0.15A0.05O2 via Surface Structure Design. United States. https://doi.org/10.1002/smll.201904854
Zheng, Junchao, Yang, Zhuo, Dai, Alvin, Tang, Linbo, Wei, Hanxin, Li, Yunjiao, He, Zhenjiang, and Lu, Jun. Wed .
"Boosting Cell Performance of LiNi0.8Co0.15A0.05O2 via Surface Structure Design". United States. https://doi.org/10.1002/smll.201904854. https://www.osti.gov/servlets/purl/1602539.
@article{osti_1602539,
title = {Boosting Cell Performance of LiNi0.8Co0.15A0.05O2 via Surface Structure Design},
author = {Zheng, Junchao and Yang, Zhuo and Dai, Alvin and Tang, Linbo and Wei, Hanxin and Li, Yunjiao and He, Zhenjiang and Lu, Jun},
abstractNote = {Although the high energy density and environmental benignancy of LiNi0.8Co0.15A0.05O2 (NCA) holds promise for use as cathode material in Li-ion batteries, present low rate capabilities, and fast capacity fade limit its broad commercial applications. Here, it is reported that surface modification of NCA cathode (R-3m) with 5 nm-thick nanopillar layers and Fm-3m structures significantly improves electrode structure, morphology, and electrochemical performance. The formation of nanopillar layers increases cycling and working voltage stability of NCA by shielding the host material from hydrofluoric acid and improves structural stability with the electrolyte. The modified NCA cathode exhibits an enhanced 89% capacity retention at a rate of 1 C over that of pristine NCA (75.2%) after 150 cycles and effectively suppresses working voltage fade (a drop of 0.025 V after 300 cycles) during repeated charge-discharge cycles. In addition, the diffusion barrier of Li ions in NCA crystals at 0.80 V is noticeably smaller than that of Li ions in pristine NCA (0.87 eV). These findings demonstrate that this unique surface structure design considerably enhances cycle and rate performance of NCA, which has potential applications in other Ni-rich layered cathode materials.},
doi = {10.1002/smll.201904854},
journal = {Small},
number = 50,
volume = 15,
place = {United States},
year = {Wed Nov 13 00:00:00 EST 2019},
month = {Wed Nov 13 00:00:00 EST 2019}
}
Web of Science
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