Study on Wind-up Type Mechanical Energy Storage of Carbon Nanotube

2014 Fiscal Year Final Research Report

• Project/Area Number: 25870856
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Nanomaterials engineering; Nanomaterials chemistry
• Research Institution: Tokyo University of Science, Suwa
• Principal Investigator: UTSUMI Shigenori 諏訪東京理科大学, 工学部, 准教授 (00454257)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: カーボンナノチューブ / ナノカーボン / 捻り / 機械的エネルギー / 重量エネルギー密度 / CNT紡績糸

Outline of Final Research Achievements

To solve the problems on storage, delivery, and portability of energy, we focus on the wind-up type mechanical energy storage of carbon nanotube (CNT) which has high tensile strength and elasticity and is light. The purpose of this study is to determine experimentally the gravimetric energy density stored by twisting CNT. An apparatus measuring tensile force and torque causing when samples were twisted to calculate the gravimetric energy density was constructed. As a result, the gravimetric energy density was 0.052 MJ/kg for carbon fiber and 3.8×10-4 MJ/kg for graphene oxide. Moreover, the maximum gravimetric energy density of CNT yarn with 11 um in diameter was 0.61 MJ/kg, which is comparable to Lithium ion battery.

Free Research Field

炭素材料　物理化学　界面化学　磁性材料