Solid lithium electrolyte-Li4Ti5O12 composites as anodes of lithium-ion batteries showing high-rate performance

Yujing Sha, Tao Yuan, Bote Zhao, Rui Cai, Huanting Wang, Zongping Shao

Research output: Contribution to journalArticleResearchpeer-review

Abstract

A new concept lithium-ion conducting lithium lanthanum titanate solid electrolyte and Li4Ti5O12 composite is proposed as efficient anode of lithium-ion batteries with outstanding rate performance, which can be facilely prepared by one-pot combustion technique. The as-synthesized composites are in micrometer size with dense nature which effectively reduces the electrode-liquid electrolyte interface area, thus decreasing irreversible capacity during the first charge–discharge cycle and prolonging cycling stability. However, the composites are rich in lithium lanthanum titanate and Li4Ti5O12 dual phase boundaries due to intimate nanoscale mixing of the two phases. The apparent lithium-ion conductivity of the composite electrode gets significantly improved as compared to pristine Li4Ti5O12 due to the incorporation of lithium lanthanum titanate phase, a high lithium ionic conductor. As a result, the as-synthesized composites show a high capacity of 113.5 mA h g−1 even at a discharge rate of 40 C, more than 200% that of a pristine Li4Ti5O12. The concept is general, which may also be applicable to other electrode materials, and it thus introduces a new way for the development of high rate-performance electrodes for lithium-ion batteries.
Original languageEnglish
Pages (from-to)177 - 185
Number of pages9
JournalJournal of Power Sources
Volume231
DOIs
Publication statusPublished - 2013

Cite this

Sha, Yujing ; Yuan, Tao ; Zhao, Bote ; Cai, Rui ; Wang, Huanting ; Shao, Zongping. / Solid lithium electrolyte-Li4Ti5O12 composites as anodes of lithium-ion batteries showing high-rate performance. In: Journal of Power Sources. 2013 ; Vol. 231. pp. 177 - 185.
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title = "Solid lithium electrolyte-Li4Ti5O12 composites as anodes of lithium-ion batteries showing high-rate performance",
abstract = "A new concept lithium-ion conducting lithium lanthanum titanate solid electrolyte and Li4Ti5O12 composite is proposed as efficient anode of lithium-ion batteries with outstanding rate performance, which can be facilely prepared by one-pot combustion technique. The as-synthesized composites are in micrometer size with dense nature which effectively reduces the electrode-liquid electrolyte interface area, thus decreasing irreversible capacity during the first charge–discharge cycle and prolonging cycling stability. However, the composites are rich in lithium lanthanum titanate and Li4Ti5O12 dual phase boundaries due to intimate nanoscale mixing of the two phases. The apparent lithium-ion conductivity of the composite electrode gets significantly improved as compared to pristine Li4Ti5O12 due to the incorporation of lithium lanthanum titanate phase, a high lithium ionic conductor. As a result, the as-synthesized composites show a high capacity of 113.5 mA h g−1 even at a discharge rate of 40 C, more than 200{\%} that of a pristine Li4Ti5O12. The concept is general, which may also be applicable to other electrode materials, and it thus introduces a new way for the development of high rate-performance electrodes for lithium-ion batteries.",
author = "Yujing Sha and Tao Yuan and Bote Zhao and Rui Cai and Huanting Wang and Zongping Shao",
year = "2013",
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pages = "177 -- 185",
journal = "Journal of Power Sources",
issn = "0378-7753",
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Solid lithium electrolyte-Li4Ti5O12 composites as anodes of lithium-ion batteries showing high-rate performance. / Sha, Yujing; Yuan, Tao; Zhao, Bote; Cai, Rui; Wang, Huanting; Shao, Zongping.

In: Journal of Power Sources, Vol. 231, 2013, p. 177 - 185.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Shao, Zongping

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AB - A new concept lithium-ion conducting lithium lanthanum titanate solid electrolyte and Li4Ti5O12 composite is proposed as efficient anode of lithium-ion batteries with outstanding rate performance, which can be facilely prepared by one-pot combustion technique. The as-synthesized composites are in micrometer size with dense nature which effectively reduces the electrode-liquid electrolyte interface area, thus decreasing irreversible capacity during the first charge–discharge cycle and prolonging cycling stability. However, the composites are rich in lithium lanthanum titanate and Li4Ti5O12 dual phase boundaries due to intimate nanoscale mixing of the two phases. The apparent lithium-ion conductivity of the composite electrode gets significantly improved as compared to pristine Li4Ti5O12 due to the incorporation of lithium lanthanum titanate phase, a high lithium ionic conductor. As a result, the as-synthesized composites show a high capacity of 113.5 mA h g−1 even at a discharge rate of 40 C, more than 200% that of a pristine Li4Ti5O12. The concept is general, which may also be applicable to other electrode materials, and it thus introduces a new way for the development of high rate-performance electrodes for lithium-ion batteries.

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