Surface and Structural Stabilities of Carbon Additives in High Voltage Lithium Ion Batteries

Journal Article · Fri Nov 23 00:00:00 EST 2012 · Journal of Power Sources

DOI:https://doi.org/10.1016/j.jpowsour.2012.11.038· OSTI ID:1117091

Zheng, Jianming ^[1]; Xiao, Jie ^[1]; Xu, Wu ^[1]; Chen, Xilin ^[1]; Gu, Meng ^[1]; Li, Xiaohong S. ^[1]; Zhang, Jiguang ^[1]

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1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

Several different carbons have been systematically investigated in high voltage lithium ion batteries. It was founded that the higher surface area, the more parasitic reactions initiating from different onset voltages. A closer inspection reveals that for the low surface area carbon such as Super P, PF6- ions intercalate into carbon structure above 4.7 V contributing partial capacity. For high surface area carbon, in addition to the electrolyte decomposition, the oxidation of functional groups at high voltage further increases the irreversible capacities and Li+ ion consumption. Coulombic efficiency, reversible capacity and cycling stability observed by using different carbon additives are successfully correlated with their structure and surface chemistry providing information for predictive selection of carbons in different energy storage systems.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1117091
• Report Number(s): PNNL-SA-89391; 47414; 40125; VT1201000
• Journal Information: Journal of Power Sources, Vol. 227; ISSN 0378-7753
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
Carbon
PF6- intercalation
Functional group
High voltage
Lithium ion battery
Energy storage
Environmental Molecular Sciences Laboratory