• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Nanotechnology >High capacity lithium ion batteries composed of cobalt oxide nanoparticle anodes and Raman spectroscopic analysis of nanoparticle strain dynamics in batteries
【24h】

High capacity lithium ion batteries composed of cobalt oxide nanoparticle anodes and Raman spectroscopic analysis of nanoparticle strain dynamics in batteries

机译：高容量锂离子电池组成的钴氧化物纳米粒子阳极和电池中纳米粒子应变动力学的拉曼光谱分析

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Cobalt nanoparticle thin films were electrophoretically deposited on copper current collectors and were annealed into thin films of hollow Co3O4 nanoparticles. These thin films were directly used as the anodes of lithium ion batteries (LIBs) without the addition of conducting carbons and bonding agents. LIBs thus fabricated show high gravimetric capacities and long cycle lives. For approximate to 1.0 mu m thick Co3O4 nanoparticle films the gravimetric capacities of the batteries were more than 800 mAh g(-1) at a current rate of C/15, which is about 90% of the theoretical maximum. Additionally, the batteries were able to undergo 200 charge/discharge cycles at a relatively fast rate of C/5 and maintain 50% of the initial capacity. In order to understand the electrochemistry of lithiation in the context of nanoparticles, Raman spectra were collected at different stages of the electrode cycles to determine the chemical and structural changes in the nanomaterials. Our results indicate that initially the electrode nanoparticles were under significant strain and as the battery underwent many cycles of charging/discharging the nanoparticles experienced progressive strain relaxation.
机译：钴纳米粒子薄膜在铜集电器上电泳沉积，并在中空CO3O4纳米颗粒的薄膜中退火。这些薄膜直接用作锂离子电池（Libs）的阳极（Libs），而不添加导电碳和粘合剂。因此，LIBS制造出高重量能力和长循环寿命。对于1.0μm厚的CO3O4纳米颗粒膜，电池的重量能力在C / 15的电流速率下大于800mAhg（-1），其约为理论最大的90％。另外，电池能够以相对速度的C / 5速率进行200个充电/放电循环，并保持50％的初始容量。为了理解在纳米颗粒的背景下的锂锂的电化学，在电极循环的不同阶段收集拉曼光谱，以确定纳米材料的化学和结构变化。我们的结果表明，最初，电极纳米颗粒在显着的应变下，并且当电池接受了许多充电/放电循环时，纳米颗粒经历了渐进式应变松弛。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号