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dc.contributor.authorLiu, Jie
dc.contributor.authorSun, Minghao
dc.contributor.authorZhang, Qian
dc.contributor.authorDong, Feifei
dc.contributor.authorKaghazchi, Payam
dc.contributor.authorFang, Yanxiong
dc.contributor.authorZhang, Shanqing
dc.contributor.authorLin, Zhan
dc.date.accessioned2019-07-04T12:31:28Z
dc.date.available2019-07-04T12:31:28Z
dc.date.issued2018
dc.identifier.issn2050-7488
dc.identifier.doi10.1039/c8ta01138a
dc.identifier.urihttp://hdl.handle.net/10072/380428
dc.description.abstractBinders 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.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherRoyal Society of Chemistry
dc.publisher.placeUnited Kingdom
dc.relation.ispartofpagefrom7382
dc.relation.ispartofpageto7388
dc.relation.ispartofissue17
dc.relation.ispartofjournalJournal of Materials Chemistry A
dc.relation.ispartofvolume6
dc.subject.fieldofresearchMacromolecular and materials chemistry
dc.subject.fieldofresearchMacromolecular and materials chemistry not elsewhere classified
dc.subject.fieldofresearchMaterials engineering
dc.subject.fieldofresearchOther engineering
dc.subject.fieldofresearchChemical engineering
dc.subject.fieldofresearchcode3403
dc.subject.fieldofresearchcode340399
dc.subject.fieldofresearchcode4016
dc.subject.fieldofresearchcode4099
dc.subject.fieldofresearchcode4004
dc.titleA robust network binder with dual functions of Cu2+ ions as ionic crosslinking and chemical binding agents for highly stable Li-S batteries
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.hasfulltextNo Full Text
gro.griffith.authorZhang, Shanqing


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