Details

Autor(en) / Beteiligte

• Lin, Cheng-Hung
• Ju, Zhengyu
• Zheng, Xiaoyin
• Zhang, Xiao
• Zmich, Nicole
• Liu, Xiaoyang
• Takeuchi, Kenneth J.
• Marschilok, Amy C.
• Takeuchi, Esther S.
• Ge, Mingyuan
• Yu, Guihua
• Chen-Wiegart, Yu-chen Karen

Titel

Dimensionality effect of conductive carbon fillers in LiNi1/3Mn1/3Co1/3O2 cathode

Ist Teil von

• Carbon (New York), 2022-03, Vol.188, p.114-125

Ort / Verlag

New York: Elsevier Ltd

Erscheinungsjahr

2022

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Developing advanced electrode architectures through modifying active materials, conductive fillers, binders, and electrolytes as well as processing methods has drawn significant research interest. Due to the insufficient electrical conductivity of many active materials, adding conductive carbon fillers to composite electrodes provides the necessary electrical conductivity. The dimensionality effect among different conductive fillers has a significant impact on electrochemistry, which can be associated with morphological and chemical heterogeneities of electrodes. Here, synchrotron X-ray mosaic nanotomography and X-ray spectroscopy nanoimaging provided direct three-dimensional (3D) visualization and quantification capabilities to investigate the dimensionality effects of Super P (SP) and single-walled carbon nanotube (SWCNT) fillers on the capacity retention of LiNi1/3Mn1/3Co1/3O2 (NMC111). The results indicate that NMC/SWCNT electrodes, with a wrapping effect from the SWCNTs, exhibited more homogeneous particle size distributions, morphological changes, and chemical states than NMC/SP electrodes, without the wrapping effect. This work developed a framework of 3D quantification methods to study the capacity fading behavior associated with morphological and chemical heterogeneities and paved the way toward designing electrodes for high rate energy storage applications. [Display omitted] •Capacity fade due to morphological degradation in LiN1-x-yMnxCoyO2 particles.•Different shapes and dimensions of fillers showing an impact on capacity retention.•Large 3D volume visualization and quantification with sub-50 nm spatial resolution.•Single-walled carbon nanotubes showing a superior morphology and chemistry.•Single-walled carbon nanotubes reducing the negative effects of cracks.