An inverse-spinel Mg<sub>2</sub>MnO<sub>4</sub> cathode for high-performance and flexible aqueous zinc-ion batteries

Yuan, Xuming; Sun, Taolei; Zheng, Shibing; Bao, Junquan; Liang, Jing; Tao, Zhanliang

doi:10.1039/d0ta08916h

Cited by 31 publications

(16 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The electrical impedance spectroscopy (EIS) spectra in dark and light conditions (see Figure 4d) show two semicircles; we refer to previous work for more details on the EIS spectra of ZIBs. 21 Under illumination, the charge transfer resistance decreases from ∼95 to ∼74 Ω (inset), which is in agreement with previous reports on light interactions with Zn-ion batteries. 12,13 Finally, our hν-ZIBs show a ∼82% capacity retention after 200 cycles (see Figure 4e) and 54% after 1000 cycles (see Figure S7), whereas without the ZnO coating (MoS 2 /CF), the electrode shows the capacity retention of ∼84% after 200 cycles (see Figure S8).…”

Section: Resultssupporting

confidence: 91%

Molybdenum Disulfide–Zinc Oxide Photocathodes for Photo-Rechargeable Zinc-Ion Batteries

2021

View full text Add to dashboard Cite

Systems for harvesting and storing solar energy have found practical applications ranging from solar farms to autonomous smart devices. Generally, these energy solutions consist of solar cells for light harvesting and rechargeable batteries to match the solar energy supply to consumption demands. Rather than having a separate energy harvesting and storing device, we report photo-rechargeable zinc-ion batteries (hν-ZIBs) using a photoactive cathode composed of layer-by-layer grown zinc oxide and molybdenum disulfide. These photocathodes are capable of harvesting solar energy and storing it in the same material and alleviate the need for solar cells or power converters. The proposed photocathodes achieve photoconversion efficiencies of ∼1.8% using a 455 nm light source and ∼0.2% of solar-conversion efficiencies. Light not only allows photocharging but also enhances the battery capacity from 245 to 340 mA h g–1 (specific current of 100 mA g–1 and 12 mW cm–2 light intensity at 455 nm). Finally, the proposed hν-ZIBs also demonstrate a capacity retention of ∼82% over 200 cycles.

show abstract

Section: Resultssupporting

confidence: 91%

Molybdenum Disulfide–Zinc Oxide Photocathodes for Photo-Rechargeable Zinc-Ion Batteries

2021

View full text Add to dashboard Cite

show abstract

“…In brief, the Zn||NHMO battery is first galvanostatic discharge or charge for 10 min with a current of 0.5 mA, then standing for 30 min to allow the voltage reach equilibrium (Figure 4e). Following this equation: [ 47 ]

\begin{matrix} D_{i o n s} = \frac{4}{π τ} {(\frac{m_{B} V_{M}}{M_{B} V})}^{2} {(\frac{Δ E_{S}}{Δ E_{τ}})}^{2} \end{matrix}

where τ is the duration time of the current pulse, m B is the mass of the active material, M B is the molecular weight (g mol −1 ), V m is the molar volume (cm 3 mol −1 ), A is the area of active material, ΔE s is the steady‐state potential change, and ΔE τ is the potential change during the galvanostatic pulse process. As shown in Figure 4f, the D ions of discharge and charge states are calculated to be about 10 –9 –10 –12 cm 2 s –1 , which are higher than reported materials (α‐MnO 2 : [ 48 ] 10 –13 –10 –17 ; σ‐MnO 2 : [ 28 ] 10 –12 –10 –15 ; β‑MnO 2 @Graphene Oxide: [ 41 ] 10 –10 –10 –15 ; α‐K 0.19 MnO 2 : [ 30 ] 10 –10 –10 –14 cm 2 s –1 ).…”

Section: Resultsmentioning

confidence: 99%

Hydrogen Bond Shielding Effect for High‐Performance Aqueous Zinc Ion Batteries

Sun

Zheng

Nian

et al. 2022

Small

Self Cite

View full text Add to dashboard Cite

Manganese oxides are highly desirable for the cathode of rechargeable aqueous zinc ion batteries (AZIBs) owing to their low cost and high abundance. However, the terrible structure stability of manganese oxide limits its practical application. Here, it is demonstrated that the hydrogen‐bond shielding effect can improve the electrochemical performance of manganese oxide. Briefly, (NH4)0.125MnO2 (NHMO) is prepared by introducing NH4+ into the tunnel structure of α‐MnO2. The robust hydrogen bonds between N‐H and host O atoms can stabilize the lattice structure of α‐MnO2 and suppress the dissolution of Mn element. More importantly, it can also accelerate ions mobility kinetics by weakening the electrostatic interaction of host O atoms. Thus, the fabricated Zn||NHMO battery possesses impressive cycling life (99.5% of capacity retention over 10 000 cycles) and rate capability (109 mA h g–1 of discharge capacity at 6000 mA g–1). Comprehensive analyses reveal the essences of interfacial charge and bulk ions transfer. This finding opens new opportunities for the development of high‐performance AZIBs.

show abstract

“…For example, there are abundant wind and solar in severe cold regions, but how to store these energies becomes a problem. Aqueous zinc-ion batteries (AZIBs), with merits of high theoretical specific capacity and low redox potential of Zn anode, low cost and high ionic conductivity of aqueous electrolyte, and various cathode materials, have attached tremendous attention from researchers and have shown great potential for large-scale energy storage devices [1][2][3][4][5][6]. Unfortunately, AZIBs show terrible electrochemical performance at low-temperature condition, which hinders their application in harsh environments.…”

Section: Introductionmentioning

confidence: 99%

Synergistic Effect of Cation and Anion for Low-Temperature Aqueous Zinc-Ion Battery

et al. 2021

Self Cite

View full text Add to dashboard Cite

Although aqueous zinc-ion batteries have gained great development due to their many merits, the frozen aqueous electrolyte hinders their practical application at low temperature conditions. Here, the synergistic effect of cation and anion to break the hydrogen-bonds network of original water molecules is demonstrated by multi-perspective characterization. Then, an aqueous-salt hydrates deep eutectic solvent of 3.5 M Mg(ClO4)2 + 1 M Zn(ClO4)2 is proposed and displays an ultralow freezing point of − 121 °C. A high ionic conductivity of 1.41 mS cm−1 and low viscosity of 22.9 mPa s at − 70 °C imply a fast ions transport behavior of this electrolyte. With the benefits of the low-temperature electrolyte, the fabricated Zn||Pyrene-4,5,9,10-tetraone (PTO) and Zn||Phenazine (PNZ) batteries exhibit satisfactory low-temperature performance. For example, Zn||PTO battery shows a high discharge capacity of 101.5 mAh g−1 at 0.5 C (200 mA g−1) and 71 mAh g−1 at 3 C (1.2 A g−1) when the temperature drops to − 70 °C. This work provides an unique view to design anti-freezing aqueous electrolyte."Image missing"

show abstract

An inverse-spinel Mg₂MnO₄ cathode for high-performance and flexible aqueous zinc-ion batteries

Abstract: Aqueous zinc-ion batteries (AZIBs) have gained extensive attention own to low cost and high safety but are bottlenecked by limited cathode materials. Here, we report an inverse-spinel structured Mg2MnO4 nanosheets...

Cited by 31 publications

References 42 publications

Molybdenum Disulfide–Zinc Oxide Photocathodes for Photo-Rechargeable Zinc-Ion Batteries

Molybdenum Disulfide–Zinc Oxide Photocathodes for Photo-Rechargeable Zinc-Ion Batteries

Hydrogen Bond Shielding Effect for High‐Performance Aqueous Zinc Ion Batteries

Synergistic Effect of Cation and Anion for Low-Temperature Aqueous Zinc-Ion Battery

Contact Info

Product

Resources

About

An inverse-spinel Mg2MnO4 cathode for high-performance and flexible aqueous zinc-ion batteries

Abstract: Aqueous zinc-ion batteries (AZIBs) have gained extensive attention own to low cost and high safety but are bottlenecked by limited cathode materials. Here, we report an inverse-spinel structured Mg2MnO4 nanosheets...

Cited by 31 publications

References 42 publications

Molybdenum Disulfide–Zinc Oxide Photocathodes for Photo-Rechargeable Zinc-Ion Batteries

Molybdenum Disulfide–Zinc Oxide Photocathodes for Photo-Rechargeable Zinc-Ion Batteries

Hydrogen Bond Shielding Effect for High‐Performance Aqueous Zinc Ion Batteries

Synergistic Effect of Cation and Anion for Low-Temperature Aqueous Zinc-Ion Battery

Contact Info

Product

Resources

About

An inverse-spinel Mg₂MnO₄ cathode for high-performance and flexible aqueous zinc-ion batteries