Mn3O4 encapsulated in hollow carbon spheres coated by graphene layer for enhanced magnetization and lithium-ion batteries performance

New insights into the outstanding performances of nickel‐doped manganese oxide nanoparticles embedded in a 3D carbon nanopipes framework as anode for lithium and sodium‐ion batteries

“…The values of CE were improved continuously after the initial cycle, attained over 99% within 10 cycles, and maintained the same up to 500th cycles for all the electrodes. The present capacity of Ni(5)‐Mn 3 O 4 (1)@CMK‐5 electrode is higher or analogous to former Mn 3 O 4 ‐based anodes stated in the articles 15‐17,19‐27,32‐35,46,52,53,56,57 . The atomic scale changes to Mn 3 O 4 NPs with Ni doping, proper encapsulation of Mn 3 O 4 NPs within the CMK‐5 matrix, and capacity contribution from bimodal CMK‐5 help to achieve the stated capacity for Ni(5)‐Mn 3 O 4 (1)@CMK‐5 anode.…”

“…The present capacity of Ni(5)-Mn 3 O 4 (1)@CMK-5 electrode is higher or analogous to former Mn 3 O 4 -based anodes stated in the articles. [15][16][17][19][20][21][22][23][24][25][26][27][32][33][34][35]46,52,53,56,57 The atomic scale changes to Mn 3 O 4 NPs with Ni doping, proper encapsulation of Mn 3 O 4 NPs within the CMK-5 matrix, and capacity contribution from bimodal CMK-5 help to achieve the stated capacity for Ni(5)-Mn 3 O 4 (1)@CMK-5 anode. The comparison of capacities of the current electrode systems with the published literature on Mn 3 O 4 -based electrodes is illustrated in Table S2 (SI).…”

“…Mn 3 O 4 composites with different carbon forms, for example, carbon nanotubes (CNTs), 20 graphene, 21 carbon nanofibers (CNFs), 22 reduced graphene oxide (rGO), 23 carbon coating, 24,25 activated carbon, 26 and porous graphene sheets 27 have shown some enhancement in electrochemical performances in LIBs and SIBs. For example, Cao et al obtained 895 mA h g −1 of capacity beyond 200 cycles at 500 mA g −1 for CNTs@Mn 3 O 4 nanocomposite 20 .…”

Determining the Role of Fe‐Doping on Promoting the Thermochemical Energy Storage Performance of (Mn1−xFex)3O4 Spinels

“…In particular, Mn oxides are of interest in electrochemistry, [1,2] (photo) catalysis, [3][4][5][6][7] and for the development of batteries and magnetic devices. [8][9][10] The phase diagram of the Mn-O system shows several oxides with well-defined stoichiometry, ranging from MnO 2 to MnO, which are stable in definite intervals of temperature and oxygen partial pressure. [11,12] This variety of structures and redox states is essential to explain the interest of these systems in multiple energy applications.…”

Rational design of 3D net-like carbon based Mn3O4 anode materials with enhanced lithium storage performance

“…The irreversible reduction peak at 0.72 V is mainly corresponding to the generation of the solid electrolyte interface (SEI) resulting from the decomposition of the electrolyte on the surface of the electrode. 39 The sharp cathodic peak at 0.25 V corresponds to the reduction of MnO to metallic Mn. In the anodic sweep, three delithiation peaks at 1.28, 2.08, and 2.33 V are observed, indicating the oxidation of Mn to Mn 2+ and Mn 2+ to the higher valence manganese accompanying the decomposition of Li 2 O.…”