Mn-doped FeS with larger lattice spacing as advance anode for sodium ion half/full battery

Chen, Hongyi; Yang, Xiaotian; Lv, Pengfei; Tian, Pengfu; Wan, Shuyun; Liu, Qiming

doi:10.1016/j.cej.2022.137960

Cited by 21 publications

(23 citation statements)

References 53 publications

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“…Meanwhile, the introduction of Mn species in FeS, which significantly increases the density of states (DOS) on the Fermi energy of the whole system relative to FeS, has been demonstrated. 39 The high DOS of Mn-FeS indicates that more charge carriers can directly participate in the catalytic reaction, which contributes to a significant improvement of the catalytic performance. 40 In addition, the DOS intensity at the Fermi energy level is closely related to the conductivity.…”

Section: Resultsmentioning

confidence: 99%

Compositionally modulated FeMn bimetallic skeletons for highly efficient overall water splitting

Huang

Yao

et al. 2023

Green Chem.

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Section: Resultsmentioning

confidence: 99%

Compositionally modulated FeMn bimetallic skeletons for highly efficient overall water splitting

Huang

Yao

et al. 2023

Green Chem.

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“…This observation is consistent with the results obtained from the CV curve analysis (Figure a), where the excellent contribution rate of pseudo-capacitance is attributed to the interaction of the K–Mg–Zn system. The presence of a pseudo-capacitance storage mechanism facilitates the rapid transport of carriers in KNMMZ, ensuring both excellent rate performance and long cyclic capability while maintaining structural stability. , …”

Section: Resultsmentioning

confidence: 99%

Electrochemical Mechanism Analysis of Dual-Site Doped on P2-Na_2/3Ni_1/3Mn_2/3O₂ Enabling Anionic and Cationic Redox with Excellent Electrochemical Performance

Xu,

Liu,

Zhu

et al. 2023

ACS Sustainable Chem. Eng.

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In recent years, P2-layered manganese-based cathodes have garnered considerable attention because of their exceptional capacity, high energy density, and facile synthesis. Nevertheless, the poor rate capability and inferior capacity retention at high discharge rates have limited their application in commercial batteries. In this work, we report a stable P2-type Na 0.62 K 0.05 Mn 0.67 Ni 0.17 Mg 0.11 Zn 0.05 O 2 layered oxide cathode material with both alkali metal site doping and transition metal site doping and confirm that the synergistic effect of the K−Mg−Zn system suppresses the phase transition of P2−O2 and reduces the activation energy of interfacial charge transfer. Furthermore, the introduction of the K−Mg−Zn system results in favorable cycling stability rate performance of the sample. Specifically, the initial discharge capacity at 0.1C is measured to 140.9 mAh g −1 , with a capacity retention of 95.1% after 100 cycles at 1C. Remarkably, even after 2000 cycles at 20C, the capacity retention remains at 82.8%. Ex situ X-ray photoelectron spectroscopy (XPS) analysis and the density functional theory (DFT) calculation reveal that the charge compensation during the KNMMZ charging and discharging process can be interpreted as the cooperative action of Mn 3+ /Mn 4+ and Ni 2+ /Ni 3+ /Ni 4+ redox couples in the voltage range of 2−4 V, while peaks around 4.2 V are attributed to the anionic redox action. Ex situ X-ray diffraction (XRD) analysis reveals the pronounced capability of KNMMZ to effectively suppress the P2−O2 phase transition. The complex impedance measurements and the galvanostatic intermittent titration technique validate that the K−Mg−Zn system enhances the diffusion of sodium ions. Furthermore, the full cell demonstrates outstanding cyclic electrochemical performance, underscoring its exceptional stability and durability throughout multiple charge−discharge cycles. Consequently, the P2-type Na 0.62 K 0.05 Mn 0.67 Ni 0.17 Mg 0.11 Zn 0.05 O 2 system presents promising prospects for the advancement of high-energy SIBs in practical applications.

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“…Meanwhile, the introduction of Mn species in FeS significantly increases the density of states (DOS) on the Fermi energy of the whole system relative to FeS has been demonstrated. [39] The high DOS of Mn-FeS indicates that more charge carriers can directly participate in the catalytic reaction, which contributes to a significant improvement of the catalytic performance. [40] In addition, the DOS intensity at the Fermi energy level is closely related to the conductivity.…”

Section: Electrochemical Analysismentioning

confidence: 99%

Compositionally modulated FeMn bimetallic skeletons for highly efficient overall water splitting

Huang

Yao

et al. 2023

Preprint

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Transition metal-based nanomaterials exhibit promising potential as highly active and low-cost electrocatalyst for alkaline water splitting, which can be achieved via elaborating compositional modulation and structural manipulation. This, however, normally involves multiple or even complex synthetic procedures. Herein, we report a simple one-step sulfidation of FeMnZn multi–metal skeletons for the preparation of highly efficient electrocatalysts. The incorporation of Mn and Zn induced hierarchical nano/micro sheet–to–sheet supported on open porous skeleton (FeMnZn/Mn-FeS, FMZS2), which not only facilitates electron/ion transport but also expands the accessible surface. Meanwhile, the Mn is introduced to optimize the adsorption/desorption ability of intermediates on the S sites in FeS. The resultant effect leads to remarkable electrocatalytic performance with good durability. Notably, the optimized FMZS2 delivers a 20 mA cm–2 at low overpotential of 118 mV for HER and a 100 mA cm–2 at overpotential of 390 mV for OER, outperfoming Pt/C and IrO2 catalyst, respectively. Moreover, the assembled alkaline electrolyzer also has good overall water splitting capability, which is better than that of the noble metal ones.

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Mn-doped FeS with larger lattice spacing as advance anode for sodium ion half/full battery

Cited by 21 publications

References 53 publications

Compositionally modulated FeMn bimetallic skeletons for highly efficient overall water splitting

Compositionally modulated FeMn bimetallic skeletons for highly efficient overall water splitting

Electrochemical Mechanism Analysis of Dual-Site Doped on P2-Na_2/3Ni_1/3Mn_2/3O₂ Enabling Anionic and Cationic Redox with Excellent Electrochemical Performance

Compositionally modulated FeMn bimetallic skeletons for highly efficient overall water splitting

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Mn-doped FeS with larger lattice spacing as advance anode for sodium ion half/full battery

Cited by 21 publications

References 53 publications

Compositionally modulated FeMn bimetallic skeletons for highly efficient overall water splitting

Compositionally modulated FeMn bimetallic skeletons for highly efficient overall water splitting

Electrochemical Mechanism Analysis of Dual-Site Doped on P2-Na2/3Ni1/3Mn2/3O2 Enabling Anionic and Cationic Redox with Excellent Electrochemical Performance

Compositionally modulated FeMn bimetallic skeletons for highly efficient overall water splitting

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Electrochemical Mechanism Analysis of Dual-Site Doped on P2-Na_2/3Ni_1/3Mn_2/3O₂ Enabling Anionic and Cationic Redox with Excellent Electrochemical Performance