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International Center for Materials Nanoarchitectonics (WPI-MANA)

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[[Research Highlights Vol.81]Towards Inexpensive and Highly Conductive Anion-Exchange Membranes](https://mdr.nims.go.jp/datasets/a1711bbe-aee2-4802-9893-f2eda496af3b)

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Towards Inexpensive and Highly Conductive Anion-Exchange Membranes| MANAPrevious Index NextResearch Highlights[Vol. 81]Towards Inexpensive and Highly Conductive Anion-Exchange Membranes15 Feb, 2023An international research team at MANA has worked to improve the ionic conductivity of anion-exchange membranes (AEMs) made from layered double hydroxides (LDHs), laying thefoundation for their use in many electrochemical applications.LDHs are inorganic compounds that can be made into extremely thin "nanosheets." These flexible sheetsare well-suited to serve as AEMs, which have a wide range of applications, including the manufacture ofbatteries, water treatment, and electrolysis.LDHs have ultrahigh ionic conductivity towards hydroxide ions, which facilitates the flow of current.Although LDH nanosheets can reach high levels of ionic conductivity of 10-1 S/cm, this value only affectsions moving in the in-plane direction; that is, along the nanosheet. In contrast, their ionic conductivitythrough the nanosheet --in the cross-plane direction-- is about 10-6 S/cm, which is five orders ofmagnitude lower. This hinders fast ionic conduction across AEMs comprising restacked LDH nanosheets.Fortunately, a research team from MANA, led by Prof. Renzhi Ma, has now found a solution to thisproblem. They used a simple vacuum-assisted filtration process to combine LDH nanosheets with LDHnanoparticles, producing a hybrid composite membrane. This membrane exhibited high ionicconductivity in both the in-plane and cross-plane directions.The researchers proposed that introducing nanoparticles reduced the restacking order of thenanosheets. This created diverse ion-conducting pathways in the composite membrane, ultimatelyboosting its ionic conductivity. "By changing the orientation of the nanosheets, their ultrahighconductivity along the in-plane was leveraged to achieve fast transmembrane ionic transport," explainsResearchQuantum Materials FieldNanomaterials FieldResearch SupportResearch HighlightsHot TopicsHome  > Research  > Research Highlights  > Vol. 81 Towards Inexpensive and Highly･･･About MANA Research People News Room Outreach Employment AlumniSite Map Contact Us Access to MANA Website System Requirements   Text size  Standard Large  Japanese Page2024/07/16 13:35 Towards Inexpensive and Highly Conductive Anion-Exchange Membranes| MANAhttps://www.nims.go.jp/mana/research/highlights/vol81.html 1/2https://www.nims.go.jp/mana/research/highlights/vol80.htmlhttps://www.nims.go.jp/mana/research/highlights/index.htmlhttps://www.nims.go.jp/mana/research/highlights/vol82.htmlhttps://www.nims.go.jp/mana/research/index.htmlhttps://www.nims.go.jp/mana/research/quantum_material.htmlhttps://www.nims.go.jp/mana/research/nano_material.htmlhttps://www.nims.go.jp/mana/research/researcher_support.htmlhttps://www.nims.go.jp/mana/research/highlights/index.htmlhttps://www.nims.go.jp/mana/research/hottopics/index.htmlhttps://www.nims.go.jp/mana/jp/index.htmlhttps://www.nims.go.jp/mana/research/index.htmlhttps://www.nims.go.jp/mana/research/highlights/index.htmlhttp://www.jsps.go.jp/english/e-toplevel/http://www.jsps.go.jp/english/e-toplevel/https://www.nims.go.jp/mana/index.htmlhttps://www.nims.go.jp/mana/index.htmlhttps://www.nims.go.jp/mana/about/index.htmlhttps://www.nims.go.jp/mana/research/index.htmlhttps://www.nims.go.jp/mana/member/index.htmlhttps://www.nims.go.jp/mana/news_room/2024.htmlhttps://www.nims.go.jp/mana/pror/index.htmlhttps://www.nims.go.jp/mana/recruit/index.htmlhttps://www.nims.go.jp/mana/alumni/index.htmlhttps://www.nims.go.jp/mana/siteinfo/sitemap.htmlhttps://www.nims.go.jp/mana/siteinfo/inquiry.htmlhttps://www.nims.go.jp/mana/siteinfo/access.htmlhttps://www.nims.go.jp/mana/siteinfo/accessibility.htmlhttps://www.nims.go.jp/mana/jp/research/highlights/vol81.htmlProf. Ma. The composite membrane achieved a conductivity level of 10-2 S/cm (about 10,000 timeshigher than pure LDH nanosheets) in the cross-plane direction.Prof. Ma says, "The excellent conductivity of our composite membranes will unlock their potential use ascompetitive AEMs for platinum-free electrochemical energy storage and conversion." The team's effortswill accelerate the development of less expensive AEMs for next-generation energy and environmentaltechnologies.Reference“Constructing Fast Transmembrane Pathways in a Layered Double Hydroxide Nanosheets/NanoparticlesComposite Film for an Inorganic Anion-Exchange Membrane”Fang Xian, Lulu Jia, Yoshiyuki Sugahara, Hairong Xue, Yusuke Yamauchi, Takayoshi Sasaki, and RenzhiMa.Journal: ACS Applied Materials and Interfaces 2022, 14, 51212-51221 (November 2, 2022)DOI : 10.1021/acsami.2c15764AffiliationsInternational Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for MaterialsScience (NIMS), Namiki 1-1, Tsukuba, Ibaraki 305-0044, JapanContact informationResearch Center for Materials Nanoarchitectonics (MANA)National Institute for Materials Science1-1 Namiki, Tsukuba, Ibaraki 305-0044 JapanPhone: +81-29-860-4710E-mail: mana-pr[AT]nims.go.jpTo receive our e-mail newsletter “MANA Research Highlights”, please send an e-mail with "MANA ResearchHighlights request” in the subject line or main text to the following address: mana-pr_at_nims.go.jp *Pleasechange "_at_ " in the email address to @.Research Center for Materials Nanoarchitectonics (MANA)National Institute for Materials Science (NIMS)1-1 Namiki Tsukuba, Ibaraki 305-0044 JAPAN+81-29-860-4709E-mail: mana[AT]nims.go.jpCopyright © National Institute for Materials Science. 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