LiFePO4/C ultra-thin nano-flakes with ultra-high rate capability and ultra-long cycling life for lithium ion batteries
LiFePO4/C ultra-thin nano-flakes with ultra-high rate capability and ultra-long cycling life for lithium ion batteries
复制标题
LiFePO4/C超薄纳米片，具有超高倍率能力和超长循环寿命，适用于锂离子电池
DOI：
10.1016/j.jallcom.2018.03.265
复制
发表时间：
2018-06-15
影响因子：
6.2
通讯作者：
Chen, Han
中科院分区：
文献类型：
--
作者：
Chen, Yueqian;Xiang, Kaixiong;Chen, Han
LifePo4/c超薄纳米片已通过散酸引起的蒸发自组合合成，并成功地用于完整细胞中的阴极材料。形态和结构的特征是X射线衍射仪，扫描电子显微镜和透射电子显微镜。直径约为40-80 nm的一些LifePO4/C纳米颗粒通过鳞片酸构造的LifePo4/c超薄纳米粉层连接，其他LifePo4纳米颗粒嵌入了超薄的碳纳米叶片中。 LifePo4/c超薄的纳米叶片以0.2c的速率和92 mAh g（-1）以50°C的速率以164 mAh g（-1）的速度提供164 mAh g（-1）。 1000个周期后，其容量保留率仍然为10 c速率。独特的LifePo4/c超薄纳米叶片可以有效地增加电极和电解质之间的接触，提高电子电导率和离子电导率，并促进锂离子的运输。 （c）2018 Elsevier B.V.保留所有权利。
LiFePO4/C ultra-thin nanoflakes have been synthesized via evaporative self-assembly induced by squaric acid and successfully applied for cathode materials in full cell. The morphologies and structures were characterized by X-ray diffractometer, scanning electron microscopy and transmission electron microscopy. Some LiFePO4/C nanoparticles about 40-80 nm in diameter are connected by LiFePO4/C ultra-thin nano-flakes which are constructed by squaric acids, other LiFePO4 nanoparticles are embedded in the ultra-thin carbon nanoflakes. LiFePO4/C ultra-thin nano-flakes deliver a initial discharge capacity of 164 mAh g(-1) at 0.2C rate and 92 mAh g(-1) at 50 C rate. Its capacity retention is still 96% at 10 C rate after 1000 cycles. The unique LiFePO4/C ultra-thin nano-flakes can effectively increase the contact between electrode and electrolyte, improve the electronic and ionic conductivity and promote the transportations for lithium ions. (C) 2018 Elsevier B.V. All rights reserved.