A macro-porous graphene oxide-based membrane as a separator with enhanced thermal stability for high-safety lithium-ion batteries. Issue 36 (20th April 2017)

• Record Type: Journal Article
• Authors: Liao, Haiyang; Zhang, Haiyan; Qin, Gai; Li, Zhenghui; Li, Liuqing; Hong, Haoqun
• Is Part Of: RSC advances. Volume 7:Issue 36(2017)
• Page Start: 22112
• Page End: 22120
• Publication Date: 2017-04-20
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c7ra02950k
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : To develop a separator with remarkable thermal-resistance for high-safety lithium-ion batteries, a graphene-oxide-grafted, hyper-branched polyether macro-porous membrane without any polymer binder was designed and prepared using polystyrene nanoparticles as hard templates. Abstract : To develop a separator with remarkable thermal-resistance for high-safety lithium-ion (Li-ion) batteries, a graphene oxide (GO)-grafted hyper-branched polyether (GO- g -HBPE) macro-porous membrane without any polymer binder was designed and prepared using polystyrene (PS) nanoparticles as hard templates. GO (inorganic part) provides the membrane-formation ability for GO- g -HBPE separator and HBPE (polymer part) imparts excellent affinity with the liquid electrolyte (158% for liquid electrolyte uptake). The GO- g -HBPE membrane, serving as a separator for the batteries, exhibited robust thermal dimensional stability with no dimensional changes at 200 °C for 0.5 h. Moreover, it shows a better electrochemical performance (cycle performance and rate capability) than a commercialized PP separator, implying a promising potential for application in high-safety and high-power Li-ion batteries.