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Title: Porous silicon oxide (SiO) anode enabled by a conductive polymer binder and performance enhancement by stabilized lithium metal power (SLMP)

Abstract

The invention demonstrates that only 2% functional conductive polymer binder without any conductive additives was successfully used with a micron-size silicon monoxide (SiO) anode material, demonstrating stable and high gravimetric capacity (>1000 mAh/g) for .about.500 cycles and more than 90% capacity retention. Prelithiation of this anode using stabilized lithium metal powder (SLMP.RTM.) improves the first cycle Coulombic efficiency of a SiO/NMC full cell from .about.48% to .about.90%. This combination enables good capacity retention of more than 80% after 100 cycles at C/3 in a lithium-ion full cell. We also demonstrate the important connection between porosity and the loading of silicon electrodes. By employing a highly porous silicon electrode, a high areal capacity (3.3 mAh/cm.sup.2) is obtained. This method works well to achieve high loading of other high-capacity alloy anodes, the state-of-art graphite anode, as well as a high loading of positive electrodes for LIBs.

Inventors:
;
Issue Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1568556
Patent Number(s):
10,340,508
Application Number:
14/741,383
Assignee:
The Regents of the University of California (Oakland, CA)
DOE Contract Number:  
AC02-05CH11231
Resource Type:
Patent
Resource Relation:
Patent File Date: 06/16/2015
Country of Publication:
United States
Language:
English

Citation Formats

Liu, Gao, and Zhao, Hui. Porous silicon oxide (SiO) anode enabled by a conductive polymer binder and performance enhancement by stabilized lithium metal power (SLMP). United States: N. p., 2019. Web.
Liu, Gao, & Zhao, Hui. Porous silicon oxide (SiO) anode enabled by a conductive polymer binder and performance enhancement by stabilized lithium metal power (SLMP). United States.
Liu, Gao, and Zhao, Hui. Tue . "Porous silicon oxide (SiO) anode enabled by a conductive polymer binder and performance enhancement by stabilized lithium metal power (SLMP)". United States. https://www.osti.gov/servlets/purl/1568556.
@article{osti_1568556,
title = {Porous silicon oxide (SiO) anode enabled by a conductive polymer binder and performance enhancement by stabilized lithium metal power (SLMP)},
author = {Liu, Gao and Zhao, Hui},
abstractNote = {The invention demonstrates that only 2% functional conductive polymer binder without any conductive additives was successfully used with a micron-size silicon monoxide (SiO) anode material, demonstrating stable and high gravimetric capacity (>1000 mAh/g) for .about.500 cycles and more than 90% capacity retention. Prelithiation of this anode using stabilized lithium metal powder (SLMP.RTM.) improves the first cycle Coulombic efficiency of a SiO/NMC full cell from .about.48% to .about.90%. This combination enables good capacity retention of more than 80% after 100 cycles at C/3 in a lithium-ion full cell. We also demonstrate the important connection between porosity and the loading of silicon electrodes. By employing a highly porous silicon electrode, a high areal capacity (3.3 mAh/cm.sup.2) is obtained. This method works well to achieve high loading of other high-capacity alloy anodes, the state-of-art graphite anode, as well as a high loading of positive electrodes for LIBs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {7}
}

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