title: Ultrasound-assisted synthesis of Li-rich mesoporous LiMn2O4 nanospheres for enhancing the electrochemical performance in Li-ion secondary batteries.
abstract: The hierarchically structured mesoporous LiMn(2)O(4) (LMO) nanospheres were synthesized using a template-free self-assembly process that was coupled with ultrasound (U). The ultrasound technique suggested here is very powerful for controlling an ordered nanostructure and improving crystallinity with large single-crystalline domains. Owing to the hierarchical mesoporous structure and high crystallinity, U-LMO provides an excellent rate capability and cycle stability with a capacity retention of more than 98% up to 50 cycles at a 0.2C rate. Here, we demonstrate that mesoporous U-LMO nanospheres were fabricated to enhance the electrochemical performance and protect it from structurally significant collapsing because of high crystallinity.
authors: Division of Materials Science, Korea Basic Science Institute, Daejeon 305-333, Republic of Korea.
authors: Jung Min
authors: JM
authors: Kim
authors: Gaehang
authors: G
authors: Lee
authors: Byung Hoon
authors: BH
authors: Kim
authors: Yun Suk
authors: YS
authors: Huh
authors: Go-Woon
authors: GW
authors: Lee
authors: Hae Jin
authors: HJ
authors: Kim
mesh_terms: D011211:Electric Power Supplies; D004563:Electrochemistry / Q000295:instrumentation; D004867:Equipment Design; D019544:Equipment Failure Analysis; D019220:High-Energy Shock Waves; D008094:Lithium / Q000737:chemistry* / Q000528:radiation effects*; D008345:Manganese / Q000737:chemistry / Q000528:radiation effects; D054118:Nanospheres / Q000737:chemistry* / Q000528:radiation effects* / Q000648:ultrastructure; D010087:Oxides / Q000138:chemical synthesis* / Q000737:chemistry / Q000528:radiation effects; D016062:Porosity; D011829:Radiation Dosage; D013010:Sonication / Q000379:methods*
chemical_list: D010087:Oxides; C488552:lithium manganese oxide; D008345:Manganese; D008094:Lithium