Porous ZnMn2O4 nanospheres: Facile synthesis through microemulsion method and excellent performance as anode of lithium ion battery

Hierarchical Zn1.67 Mn1.33 O4 /graphene nanoaggregates as new anode material for lithium-ion batteries

“…Table S2 shows the performance of previous studies with various compositions reported as lithium-ion battery anode materials in the Zn-Mn-O system. Materials with porous structures such as porous ZnMnO 3 spherulites, 35 porous ZnMn 2 O 4 nanospheres, 21 and porous ZnMn 2 O 4 nanowires 23 exhibited higher performance than materials with other structures (nanoparticle, 52 nanowire, 49 nanosheets 25 ). This is attributed to high specific surface area and large porosity.…”

“…16 Therefore, systematic design is required for nanostructure materials to be used as electrode materials. Various nanostructures, such as nanoparticles, 17 spheres, [18][19][20][21] rods, 22,23 and sheets, 24,25 have been reported to enhance the reversibility and cycle life. Deng et al synthesized ZnMn 2 O 4 nanoparticles via a single source precursor route and exhibited a reversible capacity of 650 mA h g −1 cycle performance at current density of 100 mA g −1 after 200 cycles.…”

β‐MnO2/Metal–Organic Framework Derived Nanoporous ZnMn2O4 Nanorods as Lithium‐Ion Battery Anodes with Superior Lithium‐Storage Performance

“…In the Mn 2p spectrum (Figure 2b), there are two distinct peaks at 652.8 and 641.0 eV,c orresponding to Mn 2p 1/2 and Mn 2p 3/2 ,r espectively,w hich can be fitted by peaks at 652.8, 654.7, 641.0, and 642.9 eV. [22][23][24] The two peaks at 652.8 and 641.0 eV are assigned to Mn 3 + .T he other two peaks, at 654.7 and 642.9 eV,a re assigned to Mn 4 + .H owever,t he fitting curve of the two peaks of Mn 4 + almosto verlaps with the baseline, which indicates that Mn 4 + has been reduced to Mn 3 + .I nt he Zn 2p spectrum (Figure 2c), there are two clear peaks at 1043.6 and 1020.6 eV,c orresponding to Zn 2p 1/2 and Zn 2p 3/2 ,r espectively. [25] Notably,t he energy difference betweent he two peaks is 23 eV,w hich is consistentw ith that of previously reported ZnMn 2 O 4 ,and indicates that the oxidations tate of Zn is + 2i nt his material.…”

Crumpled ZnMn2O4 Nanosheets for Long‐Term‐Cycling Lithium‐Ion Battery Anodes

“…Usually, ternary transition metal oxides have shown better performance than single metal oxides due to their possible synergetic enhancement . Hence, nanostructured ZnMn 2 O 4 has been investigated to improve the electrochemical performance for LIBs …”

“…[10] Hence,n anostructured ZnMn 2 O 4 has been investigatedtoimprovet he electrochemical performancefor LIBs. [10][11][12][13][14][15][16][17][18][19][20][21][22] Nanosheets and nanofibers are important in various applications such as optoelectronics, [23] solar cells, [24] and LIBs, [25] because of their high specific surface areas and short transport paths for electrons and ions.I np articular, such nanostructured materials have been extensivelys tudied as alternative LIB electrodes,with long-term cycling and ahighly reversible electrode reaction as ar esult of their ability to buffer the mechanical stress more effectively during repeated cycling.T os ynthesize the nanostructure,v ariousm ethods have been explored, mostly including hydrothermal or template routes. [26,27] However, these methods are often involved with complexp rocesses.E lectrospinning is as imple and effective methodf or fabricating nanostructures,a nd this methoda long with particular thermal treatment could be used to achieve many interestingm ultilevel nanostructures (branched nanowires, [24] wire-in-tube, [28] bamboo joint [29] ).…”