Hydrothermally prepared composite of Na3V2(PO4)2F3 with gelatin and graphene used as a high-performance sodium ion battery cathode

Fully‐Printed Flexible Aqueous Rechargeable Sodium‐Ion Batteries

“…[31] As shown in Figure S4e (Supporting Information), the binding energies at 284.6, 285.2, and 288.5 eV are attributed to the carbon coating of NVPF/C, which appear as the signals of C = C, C-C, and O-C = O bonds in the C 1s spectrum. [32] The Na, Mn, O, Ti, N, and P elements are included in the full survey spectrum of NMTP/C/NC. Figure 1e displays the four peaks of Ti 3+ and Ti 4+ ions in the Ti 2p spectrum, in which the peaks at 464.3 and 465.7 eV are assigned to 2p 1/2 and 2p 3/2 states of Ti 3+ ions, two peaks at 458.6 and 460.0 eV prove the existence of Ti 4+ ions.…”

Ionic liquids as potential electrolytes for sodium-ion batteries: an overview

“…47 Furthermore, as reported in the literature, this family of fluorophosphatebased electrodes can achieve a working potential of above 4.2 V vs. Na/Na + . [48][49][50][51] In the case of negative electrodes, despite the attractiveness of graphite due to its low cost and excellent results presented in LIBs, this allotropic form of carbon is not suitable as an electroactive material for sodium-based cells. 30 Specifically, the theoretical minimum space required for Na-ion intercalation is 0.37 nm, 52 while the interlayer spacing of graphite is 0.34 nm.…”

“…47 Furthermore, as reported in the literature, this family of fluorophosphate-based electrodes can achieve a working potential of above 4.2 V vs. Na/Na + . 48–51…”

Enhancing the performance of NaVPO4F cathode materials for sodium-ion batteries through graphite incorporation and polyethylene glycol 6000 modification

“…These techniques aim to enhance the material's electrochemical performance and expand its potential applications. [20][21][22][23][24][25][26] As anticipated, these strategies have succeeded in augmenting conductivity, leading to observable enhancements in cycling performance and rate capability to a certain extent. Nonetheless, it's worth noting that the reported NVPF composite materials can be costly, or they may fall short of meeting the commercial application demands for highly stringent energy storage because of their original discharge specific capacity being significantly lower than their theoretical specific capacity.…”