( 1. 清華大學(xué) 機械工程系, 北京 100084;
2. 哈爾濱工業(yè)大學(xué) 材料科學(xué)與工程學(xué)院, 哈爾濱 150001)
摘 要: 用機械合金化方法, 以氫氣作為保護氣氛(0.5 MPa), 通過添加碳納米管,制備出含有碳納米管的鎂基儲氫材料(Mg-3Ni-2MnO2-0.25CNTs)。 結(jié)果表明:該材料具有優(yōu)異的儲氫性能, 儲氫容量達到7.0%; 動力學(xué)性能也得到提高, 吸氫過程基本在100 s以內(nèi)完成, 在0.1 MPa下放氫過程可在600 s完成, 放氫平臺溫度在280 ℃左右。 添加碳納米管, 鎂基儲氫材料在機械球磨過程中, 可以提高其球磨效率, 顆粒更加細化均勻,傳質(zhì)與傳熱性能得到改善, 該材料具有良好的應(yīng)用前景。
關(guān)鍵字: 鎂基納米復(fù)合材料; 儲氫材料; 碳納米管(CNTs)
Mg-based materials with CNTs
FANG Wen-bin2
( 1. Department of Mechanical Engineering,
Tsinghua University, Beijing 100084, China;
2. School of Materials Science and Engineering,
Harbin Institute of Technology, Harbin 150001, China)
Abstract: Nanocomposite Mg-3Ni-2MnO-0.25CNTs was made by mechanical ball milling method under hydrogen pressure of 0.5 MPa. The nanocomposite has very high absorption hydrogen capacity and remarkable kinetic properties in hydriding /dehydriding process, for example the nanocomposite can absorb 7.0% hydrogen in 100 s at 200 ℃ under of hydrogen pressure of 2.0 MPa. The grain of Mg-based hydrogen storage materials with CNTs is much smaller in ball milling process than that of the materials without CNTs. The composites has potential application in the future.
Key words: Mg-based nanocomposite; hydrogen storage materials; carbon nanotube(CNTs)


