High-stability tin/carbon battery electrodes produced using reduction expansion synthesis
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Authors
Lee, Tongli Lim
Adams, Ryan A.
Luhrs, Claudia
Arora, Anjela
Pol, Vilas G.
Wu, Chun-Hsien
Phillips, Jonathan
Subjects
Advisors
Date of Issue
2018
Date
Publisher
Elsevier
Language
Abstract
This study shows high stability Sn (10 wt %)/carbon Li-ion battery anodes can be made via the Reduction Expansion Synthesis (RES) process. Hybrid Sn/C anodes had an initial capacity of 425 mAh g-1 which stabilized to ~340 mAh g-1 after less than 10 cycles. Unlike earlier Sn/C anodes, capacity remained virtually constant for more than 180 additional cycles. Neat carbon independently tested for Li capacity had a steady specific capacity of 280 mAh g-1. The difference detected between the pure carbon and Sn/C cases are consistent with Sn having the theoretical capacity of ~1000 mAh g-1. The high stability of the RES derived anodes, relative to earlier Sn based electrodes, is postulated to exist because RES synthesis enables the formation of direct, strong bond between Sn and carbon substrate atoms, hence reducing the rate of Sn electrode disintegration and capacity fade due to expansion upon lithiation. X-ray diffraction and transmission electron microscopy are consistent with this postulate as both show an initial Sn particles size of only a few nanometers and minimal growth after cycling. Reduced interface resistance is also indicative of unique Sn-carbon bond.
Type
Article
Description
17 USC 105 interim-entered record; under review.
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Sponsors
Office of Naval Research for supporting this project under Naval Enterprise Partnership Teaming with Universities for National Excellence at Purdue Center for Power and Energy Research
Funding
Grant number N00014-15-1-2833
Format
Citation
Lee, Tongli Lim, et al. "High-stability tin/carbon battery electrodes produced using reduction expansion synthesis." Carbon 132 (2018): 411-419.
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.