Hydrated lithium ions intercalated V2O5 with dual-ion synergistic insertion mechanism for high-performance aqueous zinc-ion batteries

MIL‐47(V) Derived V2O5@Carbon Core‐Shell Microcuboids with Oxygen Vacancies as Advanced Conversion Cathodes for High‐Performance Zinc‐Ion Batteries

“…Encouragingly, an extraordinary energy density of 130.9 Wh kg −1 is obtained at a high‐power output of 6545.5 W kg −1 . This result herein also represents competitive performance comparing with the reported vanadium based cathode materials [14b,21,27] . Furthermore, Figure 4e–f shows the cyclic performances of the V 2 O 5‐ x @CCSMs electrodes at the current density of 1.0, 5.0 and 10.0 A g −1 .…”

Boosting the Rate Capability of Aqueous Zinc-Ion Batteries Using VNxOy/C Spheres Derived from a Self-Assembled V-polydopamine Complex

“…The broad peaks of the D- and G-bands indicate an amorphous carbon structure. According to the intensity of the D- and G-band in the Raman spectra, the value of I D / I G in V x O y /C is 0.8 lower than that of VN x O y /C ( I D / I G = 1.1), which indicates the increase of defects in the carbon structure for VN x O y /C . This is mainly attributed to more V–O bonds replaced by V–N and V–N–O bonds around the amorphous carbon framework in VN x O y /C.…”

“…The introduction of a highly electronegative N element results in a stronger chemical interaction (Figure f). Three characteristic peaks located at 530, 531.6, and 533.1 eV in the O 1s spectra are detected, corresponding to V–O, C–O, and O–H, respectively (Figure g). , As shown in Figure h, the peaks of V 2 O 3 /C located at 398.6, 399.8, and 400.7 eV correspond to pyridinic N, pyrrole N, and graphitic N, respectively, and the N element is generated during the pyrolysis of the V-PDA precursor, which might contribute to the enhancement of electrical conductivity and ion transport capacity. Interestingly, a blue shift (0.9 eV) appears for the binding energy of pyridinic N in VN x O y /C, which is mainly due to the formation of the V–N bond and consistent with the results of the V 2p spectra.…”

“…Three characteristic peaks located at 530, 531.6, and 533.1 eV in the O 1s spectra are detected, corresponding to V−O, C−O, and O−H, respectively (Figure 3g). 58,59 As shown in Figure 3h, the peaks of V 2 O 3 /C located at 398.6, 399.8, and 400.7 eV correspond to pyridinic N, pyrrole N, and graphitic N, 57 0.2 mV s −1 , while the three cathodic peaks at 0.41, 0.77, and 0.99 V appear with the increase in the scan rate (Figure 5a).…”

Enhanced cathode integrity for zinc–manganese oxide fiber batteries by a durable protective layer

“…[1][2][3][4] In this regard, aqueous Znion batteries (AZIBs) have attracted increasing interest due to a low redox potential of À0.76 V vs. the standard hydrogen electrode (SHE), a high theoretical specic capacity of 820 mA h g À1 , and low cost of the Zn anode. [5][6][7][8][9] As a promising paradigm, aqueous Zn-MnO 2 batteries with ZnSO 4 /MnSO 4 electrolytes demonstrate broad electrochemical windows, ecofriendliness, high specic capacity, and facile fabrication. Incorporating aqueous Zn-MnO 2 ber batteries into breathable battery textiles provides an efficient and safe solution for powering wearable electronics.…”