Manganese oxides/N-doped carbon particles with high capacity retention for aqueous rechargeable zinc battery
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Manganese dioxide as the electrode for aqueous zinc-ion batteries (AZIBs) is influenced by the material dissolution. Herein, β-MnO2/N-doped carbon matrix (NCm) or Mn5O8/NCm composites were fabricated by effective synthesis process using polyaniline (PANI) as carbon/nitrogen sources. The conductive N-doped carbon layer was tied to β-MnO2, which increased the electrical conductivity of the β-MnO2 nanorod. At current densities of 200 mA g−1, the β-MnO2/NCm electrode delivered a higher discharge capacity of 331 mAh g−1 comparing with 185 mAh g−1 for the pure β-MnO2 electrode. Besides, the Mn5O8/NCm electrode could provide a discharge capacity of 266 mAh g−1. Therefore, the approach in this study may pave the way on preparing manganese oxides/NCm materials for AZIBs.
KeywordsManganese oxide N-doped Cathode materials Capacity retention Mild aqueous electrolyte Energy storage
The work described in this paper was supported by Shandong Province Natural Science Foundation (ZR2012EMM009, ZR2013EMQ005 and ZR2018MEM012), the Foundation of Key Laboratory of Pulp and Paper Science and Technology of Ministry of Education/Shandong Province of China (No. KF201602), the Scientific Research Foundation for the Returned Overseas Scholars in Jinan (20100406), National Training Program of Innovation and Entrepreneurship for Undergraduates (201610431033 and 201810431008), and National Natural Science Foundations of China (31570566, 31500489, 51372140, 51303086, 51403111, 51503107, and 51172130).
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Conflict of interest
The authors declare that they have no conflict of interest.
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