@article{34351, author = {Wenfeng Mao and Wei Yue and Zijia Xu and Jin Wang and Jingbo Zhang and Dejun Li and Bo Zhang and Shaohua yang and Kehua Dai and Gao Liu and Guo Ai}, title = {Novel Hoberman Sphere Design for Interlaced Mn3O4@CNT Architecture with Atomic Layer Deposition-Coated TiO2 Overlayer as Advanced Anodes in Li-Ion Battery}, abstract = {

The Hoberman sphere is a stable and stretchable spatial structure with a unique design concept, which can be taken as the ideal prototype of the internal mechanical/conductive skeleton for the anode with large volume change. Herein, Mn3O4 nanoparticles are interlaced with a Hoberman sphere-like interconnected carbon nanotube (CNT) network via a facile self-assembly strategy in which Mn3O4 can “locally expand” in the CNT network, limit the volume expansion to the interior space, and maintain a stable outer surface of the hybrid particle. Furthermore, an ultrathin uniform ALD-coated TiO2 shell is adopted to stabilize the solid electrolyte interphase (SEI), provide high electron conductivity and lithium ion (Li+) diffusivity with lithiated LixTiO2, and enhance the reaction kinetics of the Mn3O4 by an “electron-density enhancement effect”. With this design, the Mn3O4@CNT/TiO2 exhibits a high capacity of 1064 mAh g–1 at 0.1 A g–1, a stable cycling stability over 200 cycles, a superior rate capability, and a commercial-level areal capacity of 4.9 mAh cm–2. In this way, a novel electrode design strategy is achieved by the Hoberman sphere-like CNT design along with the in situ porous formation, which can not only achieve a high-performance anode for LIBs but also can be widely adapted in a variety of advanced electrode materials for alkali metal ion batteries.

}, year = {2020}, journal = {ACS Applied Materials & Interfaces}, volume = {12}, pages = {39282 - 39292}, month = {08/2020}, issn = {1944-8244}, doi = {10.1021/acsami.0c11282}, language = {eng}, }