10.1021/nl803394v.s001 Eiji Hosono Eiji Hosono Tetsuichi Kudo Tetsuichi Kudo Itaru Honma Itaru Honma Hirofumi Matsuda Hirofumi Matsuda Haoshen Zhou Haoshen Zhou Synthesis of Single Crystalline Spinel LiMn<sub>2</sub>O<sub>4</sub> Nanowires for a Lithium Ion Battery with High Power Density American Chemical Society 2009 sintering process nanostructured electrodes grain growth cycle stability anisotropic crystal structure Lithium Ion Battery Na 0.44MnO nanowires High Power DensityHow lithium ion battery cathode material LiCoO 2. nanosize grains cathode materials spinel LiMn 2O nanowires show nonwoven fabric morphology novel reaction method spinel LiMn 2O nanowires crystal structure power density LiMn 2O grain size metal oxide 12 h lithium ion battery performance Single Crystalline Spinel LiMn 2O Nanowires spinel LiMn 2O nanowire structure 2009-03-11 00:00:00 Journal contribution https://acs.figshare.com/articles/journal_contribution/Synthesis_of_Single_Crystalline_Spinel_LiMn_sub_2_sub_O_sub_4_sub_Nanowires_for_a_Lithium_Ion_Battery_with_High_Power_Density/2872375 How to improve the specific power density of the rechargeable lithium ion battery has recently become one of the most attractive topics of both scientific and industrial interests. The spinel LiMn<sub>2</sub>O<sub>4</sub> is the most promising candidate as a cathode material because of its low cost and nontoxicity compared with commercial LiCoO<sub>2</sub>. Moreover, nanostructured electrodes have been widely investigated to satisfy such industrial needs. However, the high-temperature sintering process, which is necessary for high-performance cathode materials based on high-quality crystals, leads the large grain size and aggregation of the nanoparticles which gives poor lithium ion battery performance. So there is still a challenge to synthesize a high-quality single-crystal nanostructured electrode. Among all of the nanostructures, a single crystalline nanowire is the most attractive morphology because the nonwoven fabric morphology constructed by the single crystalline nanowire suppresses the aggregation and grain growth at high temperature, and the potential barrier among the nanosize grains can be ignored. However, the reported single crystalline nanowire is almost the metal oxide with an anisotropic crystal structure because the cubic crystal structure such as LiMn<sub>2</sub>O<sub>4</sub> cannot easily grow in the one-dimentional direction. Here we synthesized high-quality single crystalline cubic spinel LiMn<sub>2</sub>O<sub>4</sub> nanowires based on a novel reaction method using Na<sub>0.44</sub>MnO<sub>2</sub> nanowires as a self-template. These single crystalline spinel LiMn<sub>2</sub>O<sub>4</sub> nanowires show high thermal stability because the nanowire structure is maintained after heating to 800 °C for 12 h and excellent performance at high rate charge−discharge, such as 20 A/g, with both a relative flat charge−discharge plateau and excellent cycle stability.