Synthesis of 3-dimensional interconnected porous Na3V2(PO4)3@C composite as a high-performance dual electrode for Na-ion batteries

Recent Progress in Electrolyte Development and Design Strategies for Next‐Generation Potassium‐Ion Batteries

“…However, the increasing cost of Li due to the scarcity and uneven geographical distribution of Li resources may limit its sustainable application in the near future [5,6] . Consequently, next‐generation secondary batteries based on earth‐abundant elements, namely Na, K, and Mg, are considered promising alternatives to LIBs in future energy storage systems [7–15] . Among them, potassium‐ion batteries (PIBs) have recently attracted significant attention owing to their low cost, eco‐friendliness, and high energy density [5,6,12] .…”

High power Na3V2(PO4)3 symmetric full cell for sodium-ion batteries

“…In terms of the cycling performance and rate performance, our full cell outperforms all the previously reported full cells in a symmetric conguration. [13][14][15][16]18,[27][28][29][30][31][32][33][34] This can be attributed to the excellent kinetics offered by the DME electrolyte in the NVP cathode and NVP anode. A Ragone plot comparing the symmetric NVP cell with different energy storage devices is shown in Fig.…”

Designed One‐Pot Strategy for Dual‐Carbon‐Protected Na3V2(PO4)3 Hybrid Structure as High‐Rate and Ultrastable Cathode for Sodium‐Ion Batteries

“…As a comparison, the NVP@C and NVP@C‐300 exhibit rapid capacity fading and deliver inferior capacity along with the increasing charge/discharge rates to 40 C, although their specific capacities are a bit higher than hierarchical NVP@C⊂C with the rates ranging from 0.5 to 10 C due to the relatively high carbon content (Figure S6, Supporting Information). The cycling stability between NVP@C and NVP@C⊂C was further investigated to evaluate the effect of hierarchical carbon protection, as shown in Figure d. It can be observed that NVP@C exhibited a slightly higher initial specific capacity of 87.5 mAh −1 g −1 than that of latter, while the NVP@C⊂C possessed much better capacity retention of 91.97 % compared with that of NVP@C (78.9 %) after 5000 cycles at 5 C. More impressively, a high specific capacity of 64.61 mAh −1 g −1 still remained after 6000 cycles at the high rate of 20 C, corresponding to a capacity retention of 80.86 % (Figure e), which is outstanding compared with the state‐of‐the‐art values in previous literature (Table S1) . In addition, in order to explore the optimized calcination conditions of NVP@C⊂C, the influence of annealing temperatures on electrochemical performance was conducted (Figure S7, Supporting Information).…”

“…The NVP@C&Cd elivers the specific capacities of 89.6, 87.5, 85.9, 83.1, 82.7, 79.1, 75.6, 72.7, 69.2, 65.7, 62.3, 54, 49.4 and 46.1 mAh À1 g À1 at the rates of 0.5, 1, 2, 5, 10, 20, 30, 40, 50, 60, 70, 80, 90 and 100 C, respectively,i ndicating an excellent capacity retention rate of 51.5 %f rom 0.5 to 100 C. When the current density was reverted to 0.5 C, ah igh specific capacityo f8 8.4 mAh À1 g À1 could be recovered, which is almost 100 %c apacity retention compared with the original value. [22,[44][45][46] In addition, in order to explore the optimized calcination conditions of NVP@C&C, the influence of annealing temperatures on electrochemical performance was conducted ( Figure S7, Supporting Information). Thec ycling stability between NVP@C and NVP@C&Cw as furtheri nvestigatedt oe valuate the effect of hierarchical carbon protection, as shown in Figure 4d.Itcan be observed that NVP@Cexhibited as lightly higher initial specific capacity of 87.5 mAh À1 g À1 than that of latter,w hile the NVP@C&Cp ossessed much better capacity retention of 91.97 %c ompared with that of NVP@C (78.9 %) after 5000 cycles at 5C.M ore impressively,ah igh specific capacity of 64.61 mAh À1 g À1 still remained after 6000 cycles at the high rate of 20 C, corresponding to ac apacity retention of 80.86 % ( Figure 4e), which is outstanding compared with the state-of-the-art values in previous literature( Ta bleS1).…”