dc.contributor.author | Liu, Jie | |
dc.contributor.author | Sun, Minghao | |
dc.contributor.author | Zhang, Qian | |
dc.contributor.author | Dong, Feifei | |
dc.contributor.author | Kaghazchi, Payam | |
dc.contributor.author | Fang, Yanxiong | |
dc.contributor.author | Zhang, Shanqing | |
dc.contributor.author | Lin, Zhan | |
dc.date.accessioned | 2019-07-04T12:31:28Z | |
dc.date.available | 2019-07-04T12:31:28Z | |
dc.date.issued | 2018 | |
dc.identifier.issn | 2050-7488 | |
dc.identifier.doi | 10.1039/c8ta01138a | |
dc.identifier.uri | http://hdl.handle.net/10072/380428 | |
dc.description.abstract | Binders play a crucial role in improving the electrochemical performance of batteries. The major challenges associated with the sulfur cathode in lithium-sulfur (Li–S) batteries are up to 76% volume change during cycling from sulfur (S) to lithium sulfide (Li2S) and the shuttle effect of polysulfide anions, resulting in poor cycling performance. Herein, we design a network binder through the crosslinking effect of sodium alginate (SA) and Cu2+ ions (named the SA–Cu binder), in which Cu2+ ions work not only as an ionic crosslinking agent for a robust network structure, but also as a chemical binding agent for polysulfide anions. The robust network binder buffers large volume variations during cycling, while electropositive Cu2+ ions immobilize polysulfide anions through strong chemical binding. The resulting sulfur electrode delivers a capacity of 925 mA h g−1 after 100 cycles at 0.2C, which is much higher than those of sulfur electrodes with only SA and PVDF binders. Due to the robust mechanical properties of the SA–Cu binder, a high-loading and crack-free sulfur electrode, i.e., a sulfur loading up to 8.05 mg cm−2, is also achieved and delivers a high areal capacity up to 9.5 mA h cm−2. This study paves a new way to immobilize polysulfide anions using the dual functions of Cu2+ ions as both the ionic crosslinking and chemical binding agents, which could open up a new direction for advanced binders for Li–S batteries in the near future. | |
dc.description.peerreviewed | Yes | |
dc.language | English | |
dc.language.iso | eng | |
dc.publisher | Royal Society of Chemistry | |
dc.publisher.place | United Kingdom | |
dc.relation.ispartofpagefrom | 7382 | |
dc.relation.ispartofpageto | 7388 | |
dc.relation.ispartofissue | 17 | |
dc.relation.ispartofjournal | Journal of Materials Chemistry A | |
dc.relation.ispartofvolume | 6 | |
dc.subject.fieldofresearch | Macromolecular and materials chemistry | |
dc.subject.fieldofresearch | Macromolecular and materials chemistry not elsewhere classified | |
dc.subject.fieldofresearch | Materials engineering | |
dc.subject.fieldofresearch | Other engineering | |
dc.subject.fieldofresearch | Chemical engineering | |
dc.subject.fieldofresearchcode | 3403 | |
dc.subject.fieldofresearchcode | 340399 | |
dc.subject.fieldofresearchcode | 4016 | |
dc.subject.fieldofresearchcode | 4099 | |
dc.subject.fieldofresearchcode | 4004 | |
dc.title | A robust network binder with dual functions of Cu2+ ions as ionic crosslinking and chemical binding agents for highly stable Li-S batteries | |
dc.type | Journal article | |
dc.type.description | C1 - Articles | |
dc.type.code | C - Journal Articles | |
gro.hasfulltext | No Full Text | |
gro.griffith.author | Zhang, Shanqing | |