2021
DOI: 10.1021/acs.energyfuels.1c02103
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Rational Design of Hierarchical Mn-Doped Na5V12O32 Nanorods with Low Crystallinity as Advanced Cathodes for Aqueous Zinc Ion Batteries

Abstract: Aqueous zinc ion batteries (ZIBs) have been regarded as one of the most promising candidates for large-scale energy storage systems. Herein, low crystallinity Mn-doped Na 5 V 12 O 32 (NMVO) with hierarchical rodlike structure has been fabricated by a one-step hydrothermal method. Due to the rational design of the phase and micro/nanostructure, NMVO has numerous voids and defects, which are beneficial to the reversible insertion/extraction of zinc ions. When utilized as cathodes for ZIBs, the electrode delivers… Show more

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Cited by 8 publications
(4 citation statements)
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“…Third, oxygen vacancies can enhance the redox activity and cycling reversibility of the MnVO electrode and reduce the occurrence of irreversible side reactions, thereby achieving excellent reversible specific capacity, rate, and cycling performance. Compared with the reported vanadium-based oxide in ZIBs, MnVO nanoribbons also exhibit superior reversible specific capacity, high rate performance, and excellent cycling performance at high current density, such as K 0.23 V 2 O 5 , V 2 O 3 @AC, V 2 O 5 , VO 2 -5@ppy, VO 2 (A), and Na 5 V 12 O 32 , which are listed in Figure S6.…”
Section: Resultsmentioning
confidence: 99%
“…Third, oxygen vacancies can enhance the redox activity and cycling reversibility of the MnVO electrode and reduce the occurrence of irreversible side reactions, thereby achieving excellent reversible specific capacity, rate, and cycling performance. Compared with the reported vanadium-based oxide in ZIBs, MnVO nanoribbons also exhibit superior reversible specific capacity, high rate performance, and excellent cycling performance at high current density, such as K 0.23 V 2 O 5 , V 2 O 3 @AC, V 2 O 5 , VO 2 -5@ppy, VO 2 (A), and Na 5 V 12 O 32 , which are listed in Figure S6.…”
Section: Resultsmentioning
confidence: 99%
“…The accelerated electron and Zn 2+ transportation resulted in outstanding electrochemical with the capacity of 427.3 mAh g −1 at 0.1 A g −1 and 178.2 mAh g −1 at 10 A g −1 . In addition, the formation energy of V MgV 2 O 4 ions doping solvothermal reaction 272 @ 0.2 128.9 @ 4 ≈75% (500) [137] (NH 4 ) 2 V 10 O 25 8H 2 O ions doping hydrothermal reaction 398 @ 0.5 161 @ 5 65% (10 000) [138] Mn-doped Na 5 V 12 O 32 ions doping hydrothermal reaction 365 @ 0.5 315 @ 5 65% (10 000) [139] at 20 A g −1 (Figure 10d). Oxygen vacancies could also be introduced into V 2 O 5 via a thermal reduction by H 2 generated by NaBH 4 .…”
Section: Omentioning
confidence: 99%
“…The cycling performance of ZIBs is determined by the transfer rate of Zn 2+ ions and the stable electrochemical reaction at electrode/electrolyte interfaces. Due to the limitations of the parasitic reaction of the zinc metal anode and the dissolution of the cathode material, the capacity of ZIBs decreases rapidly. Generally, ZIBs exhibit different working mechanisms in different electrolyte environments. In alkaline electrolytes, the (dis)­charge reactions mainly involve the insertion and extraction of H + ions. In neutral/weakly acidic electrolytes, the (dis)­charge carriers are the coinsertion of Zn 2+ and H + ions. Although ZIBs shown higher energy density in alkaline electrolytes, the excessive generation of ZnO and Zn­(OH) 4 ‑2 would reduce the reversibility of the Zn metal anode. Besides, the stable plating/stripping of Zn 2+ ions at the solid (electrode)/liquid (electrolyte) interface is crucial for the long-term cycling of ZIBs.…”
Section: Introductionmentioning
confidence: 99%