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.