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Title: Simultaneous Stabilization of LiNi 0.76Mn 0.14Co 0.10O 2 Cathode and Lithium Metal Anode by Lithium Bis(oxalato)borate as Additive

Abstract

The long-term cycling performance, rate capability, and voltage stability of lithium (Li) metal batteries with LiNi 0.76Mn 0.14Co 0.10O 2 (NMC76) cathodes is greatly enhanced by lithium bis(oxalato)borate (LiBOB) additive in the LiPF 6-based electrolyte. With 2% LiBOB in the electrolyte, a Li||NMC76 cell is able to achieve a high capacity retention of 96.8% after 200 cycles at C/3 rate (1C = 200 mA g -1), which is the best result reported for a Ni-rich NMC cathode and Li metal anode. The significantly enhanced electrochemical performance can be ascribed to the stabilization of both the NMC76-cathode/electrolyte and Li-metal-anode/electrolyte interfaces. LiBOB-containing electrolyte not only facilitates the formation of a more compact solid electrolyte interphase on the Li metal surface, it also forms a thinner cathode electrolyte interface layer, which efficiently prevents the corrosion of the cathode interface and mitigates the formation of disordered rock-salt phase after cycling. Furthermore, the fundamental findings of this work highlight the importance of recognizing the dual effects of electrolyte additives in simultaneously stabilizing both cathode and anode interfaces, so as to enhance the long-term cycle life of high-energy-density battery systems.

Authors:
 [1];  [2];  [2];  [2];  [2];  [2];  [2];  [2];  [3]; ORCiD logo [2]
  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Xiamen Univ., Fujian (People's Republic of China)
  2. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  3. Xiamen Univ., Fujian (People's Republic of China)
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1464499
Report Number(s):
PNNL-SA-133094
Journal ID: ISSN 1864-5631
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
ChemSusChem
Additional Journal Information:
Journal Volume: 11; Journal Issue: 13; Journal ID: ISSN 1864-5631
Publisher:
ChemPubSoc Europe
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; LiBOB, electrolyte additive, lithium metal battery, Ni-rich cathode

Citation Formats

Zhao, Wengao, Zou, Lianfeng, Zheng, Jianming, Jia, Haiping, Song, Junhua, Engelhard, Mark H., Wang, Chongmin, Xu, Wu, Yang, Yong, and Zhang, Ji -Guang. Simultaneous Stabilization of LiNi0.76Mn0.14Co0.10O2 Cathode and Lithium Metal Anode by Lithium Bis(oxalato)borate as Additive. United States: N. p., 2018. Web. doi:10.1002/cssc.201800706.
Zhao, Wengao, Zou, Lianfeng, Zheng, Jianming, Jia, Haiping, Song, Junhua, Engelhard, Mark H., Wang, Chongmin, Xu, Wu, Yang, Yong, & Zhang, Ji -Guang. Simultaneous Stabilization of LiNi0.76Mn0.14Co0.10O2 Cathode and Lithium Metal Anode by Lithium Bis(oxalato)borate as Additive. United States. doi:10.1002/cssc.201800706.
Zhao, Wengao, Zou, Lianfeng, Zheng, Jianming, Jia, Haiping, Song, Junhua, Engelhard, Mark H., Wang, Chongmin, Xu, Wu, Yang, Yong, and Zhang, Ji -Guang. Tue . "Simultaneous Stabilization of LiNi0.76Mn0.14Co0.10O2 Cathode and Lithium Metal Anode by Lithium Bis(oxalato)borate as Additive". United States. doi:10.1002/cssc.201800706.
@article{osti_1464499,
title = {Simultaneous Stabilization of LiNi0.76Mn0.14Co0.10O2 Cathode and Lithium Metal Anode by Lithium Bis(oxalato)borate as Additive},
author = {Zhao, Wengao and Zou, Lianfeng and Zheng, Jianming and Jia, Haiping and Song, Junhua and Engelhard, Mark H. and Wang, Chongmin and Xu, Wu and Yang, Yong and Zhang, Ji -Guang},
abstractNote = {The long-term cycling performance, rate capability, and voltage stability of lithium (Li) metal batteries with LiNi0.76Mn0.14Co0.10O2 (NMC76) cathodes is greatly enhanced by lithium bis(oxalato)borate (LiBOB) additive in the LiPF6-based electrolyte. With 2% LiBOB in the electrolyte, a Li||NMC76 cell is able to achieve a high capacity retention of 96.8% after 200 cycles at C/3 rate (1C = 200 mA g-1), which is the best result reported for a Ni-rich NMC cathode and Li metal anode. The significantly enhanced electrochemical performance can be ascribed to the stabilization of both the NMC76-cathode/electrolyte and Li-metal-anode/electrolyte interfaces. LiBOB-containing electrolyte not only facilitates the formation of a more compact solid electrolyte interphase on the Li metal surface, it also forms a thinner cathode electrolyte interface layer, which efficiently prevents the corrosion of the cathode interface and mitigates the formation of disordered rock-salt phase after cycling. Furthermore, the fundamental findings of this work highlight the importance of recognizing the dual effects of electrolyte additives in simultaneously stabilizing both cathode and anode interfaces, so as to enhance the long-term cycle life of high-energy-density battery systems.},
doi = {10.1002/cssc.201800706},
journal = {ChemSusChem},
issn = {1864-5631},
number = 13,
volume = 11,
place = {United States},
year = {2018},
month = {5}
}