Dealloying-Derived Nanoporous Cu<sub>6</sub>Sn<sub>5</sub> Alloy as Stable Anode Materials for Lithium-Ion Batteries
The volume expansion during Li ion insertion/extraction remains an obstacle for the application of Sn-based anode in lithium ion-batteries. Herein, the nanoporous (np) Cu<sub>6</sub>Sn<sub>5</sub> alloy and Cu<sub>6</sub>Sn<sub>5</sub>/Sn composite wer...
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| Online Access: | https://www.mdpi.com/1996-1944/14/15/4348 |
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| author | Chi Zhang Zheng Wang Yu Cui Xuyao Niu Mei Chen Ping Liang Junhao Liu Runjun Liu Jingcong Li Xin He |
| author_facet | Chi Zhang Zheng Wang Yu Cui Xuyao Niu Mei Chen Ping Liang Junhao Liu Runjun Liu Jingcong Li Xin He |
| author_sort | Chi Zhang |
| collection | DOAJ |
| description | The volume expansion during Li ion insertion/extraction remains an obstacle for the application of Sn-based anode in lithium ion-batteries. Herein, the nanoporous (np) Cu<sub>6</sub>Sn<sub>5</sub> alloy and Cu<sub>6</sub>Sn<sub>5</sub>/Sn composite were applied as a lithium-ion battery anode. The as-dealloyed np-Cu<sub>6</sub>Sn<sub>5</sub> has an ultrafine ligament size of 40 nm and a high BET-specific area of 15.9 m<sup>2</sup> g<sup>−1</sup>. The anode shows an initial discharge capacity as high as 1200 mA h g<sup>−1</sup>, and it remains a capacity of higher than 600 mA h g<sup>−1</sup> for the initial five cycles at 0.1 A g<sup>−1</sup>. After 100 cycles, the anode maintains a stable capacity higher than 200 mA h g<sup>−1</sup> for at least 350 cycles, with outstanding Coulombic efficiency. The ex situ XRD patterns reveal the reverse phase transformation between Cu<sub>6</sub>Sn<sub>5</sub> and Li<sub>2</sub>CuSn. The Cu<sub>6</sub>Sn<sub>5</sub>/Sn composite presents a similar cycling performance with a slightly inferior rate performance compared to np-Cu<sub>6</sub>Sn<sub>5</sub>. The study demonstrates that dealloyed nanoporous Cu<sub>6</sub>Sn<sub>5</sub> alloy could be a promising candidate for lithium-ion batteries. |
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| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T09:12:01Z |
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| spelling | doaj.art-649829eb3caa4b4fb56462b310bea0252023-11-22T05:55:27ZengMDPI AGMaterials1996-19442021-08-011415434810.3390/ma14154348Dealloying-Derived Nanoporous Cu<sub>6</sub>Sn<sub>5</sub> Alloy as Stable Anode Materials for Lithium-Ion BatteriesChi Zhang0Zheng Wang1Yu Cui2Xuyao Niu3Mei Chen4Ping Liang5Junhao Liu6Runjun Liu7Jingcong Li8Xin He9School of Applied Physics and Materials, Wuyi University, Jiangmen 529020, ChinaSchool of Applied Physics and Materials, Wuyi University, Jiangmen 529020, ChinaSchool of Applied Physics and Materials, Wuyi University, Jiangmen 529020, ChinaSchool of Applied Physics and Materials, Wuyi University, Jiangmen 529020, ChinaSchool of Applied Physics and Materials, Wuyi University, Jiangmen 529020, ChinaSchool of Applied Physics and Materials, Wuyi University, Jiangmen 529020, ChinaSchool of Applied Physics and Materials, Wuyi University, Jiangmen 529020, ChinaSchool of Applied Physics and Materials, Wuyi University, Jiangmen 529020, ChinaSchool of Applied Physics and Materials, Wuyi University, Jiangmen 529020, ChinaSchool of Applied Physics and Materials, Wuyi University, Jiangmen 529020, ChinaThe volume expansion during Li ion insertion/extraction remains an obstacle for the application of Sn-based anode in lithium ion-batteries. Herein, the nanoporous (np) Cu<sub>6</sub>Sn<sub>5</sub> alloy and Cu<sub>6</sub>Sn<sub>5</sub>/Sn composite were applied as a lithium-ion battery anode. The as-dealloyed np-Cu<sub>6</sub>Sn<sub>5</sub> has an ultrafine ligament size of 40 nm and a high BET-specific area of 15.9 m<sup>2</sup> g<sup>−1</sup>. The anode shows an initial discharge capacity as high as 1200 mA h g<sup>−1</sup>, and it remains a capacity of higher than 600 mA h g<sup>−1</sup> for the initial five cycles at 0.1 A g<sup>−1</sup>. After 100 cycles, the anode maintains a stable capacity higher than 200 mA h g<sup>−1</sup> for at least 350 cycles, with outstanding Coulombic efficiency. The ex situ XRD patterns reveal the reverse phase transformation between Cu<sub>6</sub>Sn<sub>5</sub> and Li<sub>2</sub>CuSn. The Cu<sub>6</sub>Sn<sub>5</sub>/Sn composite presents a similar cycling performance with a slightly inferior rate performance compared to np-Cu<sub>6</sub>Sn<sub>5</sub>. The study demonstrates that dealloyed nanoporous Cu<sub>6</sub>Sn<sub>5</sub> alloy could be a promising candidate for lithium-ion batteries.https://www.mdpi.com/1996-1944/14/15/4348dealloyingnanoporousCu6Sn5 alloylithium-ion battery |
| spellingShingle | Chi Zhang Zheng Wang Yu Cui Xuyao Niu Mei Chen Ping Liang Junhao Liu Runjun Liu Jingcong Li Xin He Dealloying-Derived Nanoporous Cu<sub>6</sub>Sn<sub>5</sub> Alloy as Stable Anode Materials for Lithium-Ion Batteries Materials dealloying nanoporous Cu6Sn5 alloy lithium-ion battery |
| title | Dealloying-Derived Nanoporous Cu<sub>6</sub>Sn<sub>5</sub> Alloy as Stable Anode Materials for Lithium-Ion Batteries |
| title_full | Dealloying-Derived Nanoporous Cu<sub>6</sub>Sn<sub>5</sub> Alloy as Stable Anode Materials for Lithium-Ion Batteries |
| title_fullStr | Dealloying-Derived Nanoporous Cu<sub>6</sub>Sn<sub>5</sub> Alloy as Stable Anode Materials for Lithium-Ion Batteries |
| title_full_unstemmed | Dealloying-Derived Nanoporous Cu<sub>6</sub>Sn<sub>5</sub> Alloy as Stable Anode Materials for Lithium-Ion Batteries |
| title_short | Dealloying-Derived Nanoporous Cu<sub>6</sub>Sn<sub>5</sub> Alloy as Stable Anode Materials for Lithium-Ion Batteries |
| title_sort | dealloying derived nanoporous cu sub 6 sub sn sub 5 sub alloy as stable anode materials for lithium ion batteries |
| topic | dealloying nanoporous Cu6Sn5 alloy lithium-ion battery |
| url | https://www.mdpi.com/1996-1944/14/15/4348 |
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