title: New insight in understanding oxygen reduction and evolution in solid-state lithium-oxygen batteries using an in situ environmental scanning electron microscope.
abstract: Via designing a facile microscale all-solid-state lithium-oxygen battery system constructed in an environmental scanning electron microscope, direct visualization of discharge and charge processes of the lithium-oxygen battery is achieved. Different morphologies of the discharge product are observed, including a sphere, conformal film, and red-blood-cell-like shape, with a particle size up to 1.5 μm; whereas upon charge, the decomposition initiates at their surface and continues along a certain direction, instead of from the contact point at the electrode. These new findings indicate that the electron and lithium ion conductivities of Li2O2 could support the growth and decomposition of the discharge product in our system. In addition, our results indicate that various morphologies of Li2O2 arise from the different current density and surface chemistry of CNT, and the growth and decomposition of the particle are related to the uneven distribution of the ionic and electronic conductivities of Li2O2.
authors: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences , Beijing, 100190, P. R. China.
authors: Hao
authors: H
authors: Zheng
authors: Dongdong
authors: D
authors: Xiao
authors: Xing
authors: X
authors: Li
authors: Yali
authors: Y
authors: Liu
authors: Yang
authors: Y
authors: Wu
authors: Jiaping
authors: J
authors: Wang
authors: Kaili
authors: K
authors: Jiang
authors: Chun
authors: C
authors: Chen
authors: Lin
authors: L
authors: Gu
authors: Xianlong
authors: X
authors: Wei
authors: Yong-Sheng
authors: YS
authors: Hu
authors: Qing
authors: Q
authors: Chen
authors: Hong
authors: H
authors: Li