Functionality tuning based on morphological and structural control of low-dimensional hydroxide nanomaterials

2017 Fiscal Year Final Research Report

• Project/Area Number: 15H03534
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Nanomaterials chemistry
• Research Institution: National Institute for Materials Science
• Principal Investigator: Ma Renzhi 国立研究開発法人物質・材料研究機構, 国際ナノアーキテクトニクス研究拠点, グループリーダー (90391218)
• Co-Investigator(Renkei-kenkyūsha): TAKADA Kazunori 物質・材料研究機構, エネルギー・環境材料拠点, 拠点長 (30354400) ; EBINA Yasuo 物質・材料研究機構, 国際ナノアーキテクトニクス研究拠点, 主幹研究員 (30354400)
• Research Collaborator: SUN Pengzhan ; MA Wei
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 水酸化物 / ナノシート / イオン伝導 / 複合材料

Outline of Final Research Achievements

We succeed in synthesizing a hybrid thin film/membrane featured with a superlattice structure by combining hydroxide nanosheet and graphene oxide at the molecular level. It showed a highly selective ion separation/transport property with the relative selectivity of monovalent to trivalent cations reached above 30. In addition, we discovered that hydroxide nanosheets exhibited a very high ionic conductivity approaching 10-1 S/cm. This conductivity is 10 to 100 times higher than that of conventional hydroxide ion conductor. In contrast, the conductivity in the thickness direction of the nanosheets was found to be on the order of 10-6 S/cm. Such a highly anisotropic conduction characteristic is thought to be derived from the two-dimensional structure of nanosheets.

Free Research Field

材料化学