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| 1 | 二元及三元过渡金属氧化物的制备及其电化学应用研究进展显示文摘二元及三元过渡金属氧化物由于其优异的物理和化学特性,在电化学领域得到了广泛的应用。本文主要介绍了不同元素组成的二元及三元过渡金属氧化物,以及通过不同制备方法得到的空心球状、管状、片状、立方体、棒状、针状、伞形等多种不同形貌的二元及三元过渡金属氧化物;总结了二元及三元过渡金属氧化物在超级电容器、锂离子电池和传感器领域中表现出的优异性能;最后对二元及三元过渡金属氧化物的应用前景进行了展望。 | 张玮倩 许秀玲 周国伟 | 2018 | 材料导报2018，32，21： | 8 |
| 2 | Chemical synthesis and coercivity enhancement of Nd2Fe14B nanostructures mediated by non-magnetic layer显示文摘High-performance Nd2Fei4B magnets have been widely required in various fields recently due to the lightweight and miniaturization of devices.In this work,we synthesize Nd2Fei4B nanostructures with tunable magnetic properties through surfactant-assisted high energy ball milling(SAHEBM)process,achieving prominently enhanced coercivity by forming non-magnetic layers as grain boundary phase.When the reduction annealing process was carried out as pellet with Ca,the coercivity increased from 0.8 kOe to over 3 kOe as Nd2Fei4B powder,which is proved to be the contribution of the chemical diffusion of Nd elements and the formation of Nd-rich layer as magnetic insulating medium.In addition,two-dimensional graphene oxide(GO)was employed to build extra grain boundary,by which the coercivity of the core@dual-shell structure can achieve up to 8 kOe,tenfold of the original sample.The intrinsic mechanism indicated that the Nd-diffusion induced Nd-rich phase along with the reduced GO in the system could form non-magnetic layer as grain boundary and magnetically isolate the adjacent grains,significantly enhancing the exchange coupling effect.This work markedly opens up an effective approach for the chemical preparation of high-performance Nd2Fe14B nanostructured magnets,especially after post treatment,and gives an insight on the interactions at nanoscale. | Kai Zhu Junjie Xu Xiaobai Wang Wei Li Kesong Tian Yanglong Hou | 2020 | Nano Research2020，13，4： | 3 |
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