Synergistic Effect of Co and Mn Co-Doping on SnO2 Lithium-Ion Anodes
, Tobias Eisenmann 1,2, Jakob Asenbauer 1,2, Thomas Diemant 1,2, Dorin Geiger 3, Ute Kaiser 3, Danilo Oliveira de Souza 4, Thomas E. Ashton 5, Alexandra R. Groves 5, Jawwad A. Darr 5, Stefano Passerini 1,2 and Dominic Bresser 1,2,*Round 1
Reviewer 1 Report
Comments
The SnO2 nanoparticles (co-doped with Mn and Co) exhibited better electrochemical performance than pure SnO2 nanoparticles. Multiple elements hybrid is a useful method to improve the electrochemical performance of transition metal oxides. The authors carefully characterized the structure, valence states, morphology of the SnO2 nanoparticles (co-doped with Mn and Co) by TEM, EDX, XRD, XAS, and XPS in detail. This work will support the development of conversion-alloying materials (CAMs), such as TM doped transition metal oxides. The manuscript can be accepted after minor revision and the detailed comments are as follows:
- In figure 2, the cavity filled with carbon should be marked in the TEM images.
- In the Ex situ XPS section, the authors said that the main goal was to identify the oxidation state of the involved metals (Mn, Co, and Sn) to get a better understanding of their evolution upon lithiation and delithiation. However, only Mn2p and Co2p pristine XPS spectra are presented in Figure 4. The statements of “the involved metals (Mn, Co, and Sn)” are not suitable, just Sn
Author Response
Thank you very much for your kind words and the appreciation of our work.
- We have modified the figure according to the Reviewer’s suggestion and agree that it is clearer now.
- We apologize for not having been more precise here. In fact, this was the idea, but the ex situ data for the two transition metals simply did not allow for a meaningful analysis. We have revised the text to be clear in this regard.
Reviewer 2 Report
This work introduces the de/lithiation mechanism and the synergistic impact of Co and Mn dopants inside the SnO2 lattice. The conclusion is quite impressive that the Co and Mn dopants have an antithetical redox effect to improve the reversibility of the de/lithiation process. This work is very interesting and well designed and written, I suggest this work could be accepted directly. The conclusion will also inspire readers to learn through the effect of transition metal on the performance of anode active materials.
Author Response
Thank you very much for having carefully read our manuscript and your kind appreciation.
