TY - JOUR
T1 - Revealing the complex lithiation pathways and kinetics of core-shell NiO@CuO electrode
AU - Wang, Jie
AU - Guo, Xuyun
AU - Du, Xiaoqiong
AU - Liang, Jianing
AU - Wu, Jianzhong
AU - Zhao, Guangming
AU - Li, Xiaogang
AU - Gui, Siwei
AU - Zheng, Fangyuan
AU - Zhao, Jiong
AU - Xu, Chao
AU - Wang, Deli
AU - Yang, Hui
AU - Zhang, Biao
AU - Zhu, Ye
N1 - Funding Information:
The authors are grateful for the support from the Research Grant Council of Hong Kong ( C5029–18E ), the Hong Kong Polytechnic University (ZVRP), the Research Foundation for Distinguished Scholars of Qingdao Agricultural University (665–1119008), and National Natural Science Foundation of China (Grant No. 12172143 ), and the Opening Fund of Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education (2020JYBKF04). The authors would also thank Dr. Wei Lu for optimizing the microscopes and Dr. Jiaqiang Huang for his useful discussion.
Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/10
Y1 - 2022/10
N2 - Nanostructured composite electrodes with multiple active phases offer extraordinary performance that can be harnessed in future batteries. However, it is difficult to disclose the complicated reaction pathways. In this work, NiO@CuO core-shell nanocomposites are prepared and used as anodes for lithium-ion batteries, with superior rate and stability performance compared with single-phase CuO and NiO. Using a combination of in situ and ex situ electron microscopy, a two-stage lithiation reaction pathway on NiO@CuO is identified, with CuO reduced to Cu2O first and followed by the simultaneous reduction of both Cu2O and NiO to metals, resolving the existing inconsistency in literature. Chemomechanical simulation further discloses the key role of the core-shell structure in high cycling stability of NiO@CuO, which decreases the probability of cracking during the discharge-charge process. This work provides new insights to explore lithiation mechanisms and kinetics in novel electrodes, which contribute to further development of various electrode materials.
AB - Nanostructured composite electrodes with multiple active phases offer extraordinary performance that can be harnessed in future batteries. However, it is difficult to disclose the complicated reaction pathways. In this work, NiO@CuO core-shell nanocomposites are prepared and used as anodes for lithium-ion batteries, with superior rate and stability performance compared with single-phase CuO and NiO. Using a combination of in situ and ex situ electron microscopy, a two-stage lithiation reaction pathway on NiO@CuO is identified, with CuO reduced to Cu2O first and followed by the simultaneous reduction of both Cu2O and NiO to metals, resolving the existing inconsistency in literature. Chemomechanical simulation further discloses the key role of the core-shell structure in high cycling stability of NiO@CuO, which decreases the probability of cracking during the discharge-charge process. This work provides new insights to explore lithiation mechanisms and kinetics in novel electrodes, which contribute to further development of various electrode materials.
KW - Ex/in situ electron microscopy
KW - Lithium ion batteries
KW - Lithium pathways
KW - Nickel/copper oxides electrodes
KW - Reaction kinetics
UR - http://www.scopus.com/inward/record.url?scp=85132836553&partnerID=8YFLogxK
U2 - 10.1016/j.ensm.2022.06.022
DO - 10.1016/j.ensm.2022.06.022
M3 - Journal article
AN - SCOPUS:85132836553
SN - 2405-8297
VL - 51
SP - 11
EP - 18
JO - Energy Storage Materials
JF - Energy Storage Materials
ER -