Binder-free hybrid Li4Ti5O12 anode for high performance lithium-ion batteries

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Title
Binder-free hybrid Li4Ti5O12 anode for high performance lithium-ion batteries
Author
Lim, Ji-EunKim, JehaKim, YoungsikKim, Jae-Kwang
Issue Date
2018-08
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
ELECTROCHIMICA ACTA, v.282, pp.270 - 275
Abstract
We have developed a new binder-free hybrid anode material for lithium-ion batteries, by directly coating spinel Li4Ti5O12 particles using in-situ polymerization of styrenesulfonate (SS) to form a core-shell structure. The resulting hybrid anode has significantly improved electrochemical performance, with higher reversible capacity, rate-capability, and capacity value compared with pure Li4Ti5O12. Of the initial discharge capacity of 239.2 mAh g(-1), 95.6% was retained after 100 cycles at 0.1 C-rate. The high cycle performance with increased discharge capacity is attributed to the coated poly (styrenesulfonate) (PSS) shell, which takes part in lithium ion storage and prevents the growth of a solid electrolyte interface (SEI) layer. The fast electron transfer in PSS also allows high rate-capability. Moreover, we clarify the contribution of carbon conductor in the range of 0.01 V-1.0V.
URI
https://scholarworks.unist.ac.kr/handle/201301/24704
URL
https://www.sciencedirect.com/science/article/pii/S0013468618313458?via%3Dihub
DOI
10.1016/j.electacta.2018.06.057
ISSN
0013-4686
Appears in Collections:
ECHE_Journal Papers
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