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Title: Towards reducing carbon content in silicon/carbon anodes for lithium ion batteries

Authors:
; ; ; ;
Publication Date:
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1410895
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Carbon
Additional Journal Information:
Journal Volume: 112; Journal Issue: C; Related Information: CHORUS Timestamp: 2017-12-01 17:19:22; Journal ID: ISSN 0008-6223
Publisher:
Elsevier
Country of Publication:
United Kingdom
Language:
English

Citation Formats

Zhang, Yuzi, Pan, Yue, Chen, Yanjing, Lucht, Brett L., and Bose, Arijit. Towards reducing carbon content in silicon/carbon anodes for lithium ion batteries. United Kingdom: N. p., 2017. Web. doi:10.1016/j.carbon.2016.10.058.
Zhang, Yuzi, Pan, Yue, Chen, Yanjing, Lucht, Brett L., & Bose, Arijit. Towards reducing carbon content in silicon/carbon anodes for lithium ion batteries. United Kingdom. doi:10.1016/j.carbon.2016.10.058.
Zhang, Yuzi, Pan, Yue, Chen, Yanjing, Lucht, Brett L., and Bose, Arijit. Wed . "Towards reducing carbon content in silicon/carbon anodes for lithium ion batteries". United Kingdom. doi:10.1016/j.carbon.2016.10.058.
@article{osti_1410895,
title = {Towards reducing carbon content in silicon/carbon anodes for lithium ion batteries},
author = {Zhang, Yuzi and Pan, Yue and Chen, Yanjing and Lucht, Brett L. and Bose, Arijit},
abstractNote = {},
doi = {10.1016/j.carbon.2016.10.058},
journal = {Carbon},
number = C,
volume = 112,
place = {United Kingdom},
year = {Wed Feb 01 00:00:00 EST 2017},
month = {Wed Feb 01 00:00:00 EST 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.carbon.2016.10.058

Citation Metrics:
Cited by: 4works
Citation information provided by
Web of Science

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  • Despite remarkable progress, lithium ion batteries still need higher energy density and better cycle life for consumer electronics, electric drive vehicles and large-scale renewable energy storage applications. Silicon has recently been explored as a promising anode material for high energy batteries; however, attaining long cycle life remains a significant challenge due to materials pulverization during cycling and an unstable solid-electrolyte interphase. Here, we report double-walled silicon nanotube electrodes that can cycle over 6000 times while retaining more than 85% of the initial capacity. This excellent performance is due to the unique double-walled structure in which the outer silicon oxide wallmore » confines the inner silicon wall to expand only inward during lithiation, resulting in a stable solid-electrolyte interphase. This structural concept is general and could be extended to other battery materials that undergo large volume changes.« less
  • One of the key challenges of Si-based anodes for lithium ion batteries is the large volume change upon lithiation and delithiation, which commonly leads to electrochemo-mechanical degradation and subsequent fast capacity fading. Recent studies have shown that applying nanometer-thick coating layers on Si nanoparticle (SiNPs) enhances cyclability and capacity retention. However, it is far from clear how the coating layer function from the point of view of both surface chemistry and electrochemo-mechanical effect. Herein, we use in situ transmission electron microscopy to investigate the lithiation/delithiation kinetics of SiNPs coated with a conductive polymer, polypyrrole (PPy). We discovered that this coatingmore » layer can lead to “self-delithiation” or “self-discharging” at different stages of lithiation. We rationalized that the self-discharging is driven by the internal compressive stress generated inside the lithiated SiNPs due to the constraint effect of the coating layer. We also noticed that the critical size of lithiation-induced fracture of SiNPs is increased from ~ 150 nm for bare SiNPs to ~ 380 nm for the PPy-coated SiNPs, showing a mechanically protective role of the coating layer. These observations demonstrate both beneficial and detrimental roles of the surface coatings, shedding light on rational design of surface coatings for silicon to retain high-power and high capacity as anode for lithium ion batteries.« less