Application of vertically aligned one-dimensional van der Waals heterostructures in lithium sulfur battery

2022 Fiscal Year Final Research Report

• Project/Area Number: 20KK0114
• Research Category: Fund for the Promotion of Joint International Research (Fostering Joint International Research (B))
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 28:Nano/micro science and related fields
• Research Institution: The University of Tokyo
• Principal Investigator: XIANG RONG 東京大学, 大学院工学系研究科(工学部), 外国人客員研究員 (20740096)
• Co-Investigator(Kenkyū-buntansha): 井ノ上 泰輝 大阪大学, 大学院工学研究科, 助教 (00748949) ; 熊本 明仁 東京大学, 大学院工学系研究科(工学部), 客員共同研究員 (70724590)
• Project Period (FY): 2020-10-27 – 2023-03-31
• Keywords: 一次元ファンデルワールスヘテロ構造 / カーボンナノチューブ / 透過型電子顕微鏡

Outline of Final Research Achievements

We reported the experimental synthesis of one-dimensional van der Waals (1D vdW) heterostructures, where single-crystal boron nitride nanotubes
(BNNT) and/or molybdenum disulfide nanotubes seamlessly wrap around a single-walled carbon nanotube (SWCNT) and form a coaxial hetero-nanotube
with a diameter of only several nm (Science 2020). Later, we performed a comprehensive study on the structural details and formation mechanism of chemical vapor deposition (CVD) synthesized 1D heterostructures. Edge structures, nucleation sites, and crystal epitaxial relationships are clearly revealed using transmission electron microscopy (PNAS 2021). Finally, we demonstrate the possibility of building 1D vdW heterostructures on atomically precise, single-chirality SWCNTs (Carbon 2023). We also propose a new type of additives to suppress Li dendrites but also provides guidance for using 1D heterostructures in cathode materials in practical batteries.

Free Research Field

ナノ材料

Academic Significance and Societal Importance of the Research Achievements

Designing and fabricating new materials for novel types of, particularly high energy, density batteries will be curical for the development of electric vehicles. 1D van der Waals heterostructures with proper structure is expected to be a cathode material for this purpose.