Sulfur-doped amorphous NiMoO₄ on crystalline Fe₂O₃ nanorods for enhanced lithium storage performance

Abstract

Sulfur-doped amorphous NiMoO4 on crystalline Fe2O3 nanosheets has been fabricated, which demonstrates excellent electrochemical performance as the anode for lithium ion batteries.

Oxygen‐Vacancy Abundant NiCo2O4 on the N‐Doped Carbon Nanosheets as Anode for High Performance Lithium Ion Batteries

“…The high resolution spectra of O 1s are displayed in Figure 3f and Figure S5d. The de‐convoluted characteristic peaks locating at 527.8 and 529.7 eV can be denoted as O I and O II , in which the O I ions manifest the lattice oxygen atoms in a fully‐coordinated environment, and the O II ions represent the oxygen vacancy of the samples [11,23] . Compared with the O1s spectra of NC@NiCo 2 O 4 , NiCo 2 O 4 and Co 3 O 4 , the ratio of O I /O II for NC@NiCo 2 O 4 and NiCo 2 O 4 is much higher than that of Co 3 O 4 , suggesting that more oxygen vacancies exist in the NC@NiCo 2 O 4 and NiCo 2 O 4 .…”

“…The de-convoluted characteristic peaks locating at 527.8 and 529.7 eV can be denoted as O I and O II , in which the O I ions manifest the lattice oxygen atoms in a fully-coordinated environment, and the O II ions represent the oxygen vacancy of the samples. [11,23] To highlight the excellent performance of NC@NiCo 2 O 4 as anode for LIBs, the cyclic voltammetry (CV) is firstly evaluated at a scan rate of 0.2 mV s À 1 with the voltage range of 0.01-3.0 V (vs Li/Li + ). In the first cycle, the reduction peak at 0.38 V is attributed to the conversion Ni 2 + and Co 2 + to metallic Ni and Co, and the peak shifts to 0.96 V in the subsequent cycles (Figure 4a).…”

“…As a consequence, oxygen vacancies TiO 2 nanobelts, [10] Ni 3 V 2 O 8 amorphous wire encapsulated in crystalline tube, [11] oxygen‐vacancy abundant Co 3 O 4 /graphene, [12] oxygen‐deficient Ta 2 O 5 [13] and et. al [2a,14] . are fabricated and their electrochemical performance are effectively improved.…”

Fe2O3/NiMoO4 Heterostructured Microspheres as an Anode Material for Long‐Life and High‐Performance Lithium Storage

“…The reason for this phenomenon is that the oxidation voltage of Mo/MoO 3 is lower than that of Fe/Fe 2 O 3 and Ni/NiO, thus reducing the polarization of the electrode material. [31] Moreover, the CV curves of the NFOC electrode have perfect coincidence in the first 3 cycles, indicating that NFOC has good reversibility. These processes can be described by the following equations (1-8):…”

Oxygen‐Vacancy‐Abundant Ferrites on N‐Doped Carbon Nanosheets as High‐Performance Li‐Ion Battery Anodes

“…[48,49] The O I ions are related to the lattice oxygen atoms in af ully coordinated environment, and the O II ions can be assigned to the oxygen deficiencies of the samples. [29,50] Compared with the O1ss pectrumo fF e 2 O 3 ( Figure S4, Supporting Information), NC@CoFe 2 O 4 and CoFe 2 O 4 possess more oxygen vacancies, which can effectively promote Figure 6d). [51][52][53] Twoc orresponding shake-up satellite peaks emerge at 862.1 and 880.…”