title: Direct observation of lithium-ion transport under an electrical field in LixCoO2 nanograins.
abstract: The past decades have witnessed the development of many technologies based on nanoionics, especially lithium-ion batteries (LIBs). Now there is an urgent need for developing LIBs with good high-rate capability and high power. LIBs with nanostructured electrodes show great potentials for achieving such goals. However, the nature of Li-ion transport behaviors within the nanostructured electrodes is not well clarified yet. Here, Li-ion transport behaviors in Li(x)CoO(2) nanograins are investigated by employing conductive atomic force microscopy (C-AFM) technique to study the local Li-ion diffusion induced conductance change behaviors with a spatial resolution of ~10 nm. It is found that grain boundary has a low Li-ion diffusion energy barrier and provides a fast Li-ion diffusion pathway, which is also confirmed by our first principles calculation. This information provides important guidelines for designing high performance LIBs from a point view of optimizing the electrode material microstructures and the development of nanoionics.
authors: Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences (CAS), Zhejiang, Ningbo 315201, People's Republic of China.
authors: Xiaojian
authors: X
authors: Zhu
authors: Chin Shen
authors: CS
authors: Ong
authors: Xiaoxiong
authors: X
authors: Xu
authors: Benlin
authors: B
authors: Hu
authors: Jie
authors: J
authors: Shang
authors: Huali
authors: H
authors: Yang
authors: Sadhana
authors: S
authors: Katlakunta
authors: Yiwei
authors: Y
authors: Liu
authors: Xinxin
authors: X
authors: Chen
authors: Liang
authors: L
authors: Pan
authors: Jun
authors: J
authors: Ding
authors: Run-Wei
authors: RW
authors: Li