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Volume 10
Issue 11
10.3390/min10110949
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Article
Peer-Review Record

Oxidizing Roasting Behavior and Leaching Performance for the Recovery of Spent LiFePO4 Batteries

Minerals 2020, 10(11), 949; https://doi.org/10.3390/min10110949
by Yafei Jie 1, Shenghai Yang 1, Yun Li 1,2, Duoqiang Zhao 1, Yanqing Lai 1 and Yongming Chen 1,*
Reviewer 1: Anonymous
Reviewer 2: Anonymous
Reviewer 3: Anonymous
Minerals 2020, 10(11), 949; https://doi.org/10.3390/min10110949
Submission received: 19 September 2020 / Revised: 21 October 2020 / Accepted: 22 October 2020 / Published: 25 October 2020
(This article belongs to the Special Issue Battery Minerals)

Round 1

Reviewer 1 Report

Figure 4 is missing as it is the same as Figure 7.

It would be better to change the color of Figures 3(b), 6(b), and 9(b), as the amount of C in green is difficult to recognize between Li in blue and Others in light blue. Except for this point quality of the figures is very good. 

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Reviewer 2 Report

In this work, in order to separate efficiently the LiFePO4 cathode components and Al foil, the oxidizing roasting had been conducted. The influence of process conditions, including temperature, oxygen concentration, air flow rate, on the recovery was investigated in detail. As found the roasting temperature of 500 °C, oxygen concentration of 21% O2, and air flow rate of 300 ml/min are optimal conditions in terms of the high recovery rate, high leaching rate, few hazardous impurities and low cost. The study is interesting, involved a numerous of scientific techniques and contains an important information for both materials scientists and battery engineers. Thus, I recommend this work in the present form for publication in Minerals.

Author Response

Thank you for considering the paper for publication. The authors are grateful to your wonderful review work.

Reviewer 3 Report

  1. manuscript must be revised and improved. There are not enough arguments referring to  your  contribution by roasting-oxidizing that lead to an intermediate  product Li3Fe2(PO4)3 and not Li and Fe oxides as final products. A comparison with literature need reinforce and give data related to where other publications reached.
  2. Although in your experiments show the Li composition, it is still in an intermediate compound and not as a simple oxide
  3. Observation. pag 2- lines 76 - explain why need NaCl solution; pag 3, lines 96-100- extensive description equipment. Suggest to insert in annex 

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Round 2

Reviewer 3 Report

No

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