SEI membrane reaction liquid, modification method of zinc negative electrode and modified zinc negative electrode
A zinc anode and membrane reaction technology, applied in the field of electrochemical energy storage, can solve the problems of poor cycle stability and easy falling off of SEI film, and achieve the effect of improving cycle life, solving the problems of anode dendrite and hydrogen evolution, and uniform deposition
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0059] Dissolve 0.2 mol of sodium sulfate in 2000 mL of water, add 0.3 mol of citric acid, a weak reducing agent, and stir to dissolve. Then, 0.2 mol (36.4 g) of solid vanadium pentoxide was added, and the reaction was stirred at 60° C. for 24 hours to obtain a layered vanadium-based positive electrode material with sodium ion pre-intercalation.
[0060] 70mg of sodium ion pre-intercalated layered vanadium-based cathode material, 20mg of conductive agent Ketjen Black and 10mg of binder PTFE were mixed uniformly to a plasticine state, passed through a roller press and cut into discs, and dried in a vacuum drying oven. The sodium vanadate cathode sheet is obtained by drying.
[0061] Dissolve 5mL of acrylic acid into 75mL of dimethyl sulfoxide, stir evenly, scrape and apply to the surface of the zinc flakes cleaned with deionized water, and leave standing for 12 hours to obtain the prepared zinc flakes protected by the SEI film layer ( Denoted as AA / DMSO@Zn).
[0062] figure ...
Embodiment 2
[0069] 70mg of YP80 activated carbon, 20mg of conductive agent Ketjen black and 10mg of binder PTFE were mixed uniformly to a plasticine state, passed through a roller press and cut into a disc shape, and dried in a vacuum drying oven to obtain a YP80 positive electrode sheet.
[0070] Dissolve 5mL of acrylic acid into 75mL of dimethyl sulfoxide, stir evenly, scrape and apply to the surface of the zinc flakes cleaned with deionized water, and leave standing for 12 hours to obtain the prepared zinc flakes protected by the SEI film layer ( Denoted as AA / DMSO@Zn).
[0071] Using AA / DMSO@Zn as the negative electrode, 3mol / L zinc trifluoromethanesulfonate solution as the electrolyte, and the above-mentioned YP80 positive electrode sheet as the positive electrode to assemble the button capacitor 1 and carry out the charge-discharge test to obtain Image 6 .
[0072] Depend on Image 6 It can be seen that at 10A g -1 Under the current density of 1, the button capacitor 1 can be cy...
Embodiment 3
[0074] Dissolve 5mL of acrylic acid into 25mL of dimethyl sulfoxide, stir evenly, scrape and apply to the surface of the zinc flakes cleaned with deionized water, and leave standing for 12 hours to obtain the prepared zinc flakes protected by the SEI film layer ( Denoted as AA / DMSO@Zn).
[0075] Using AA / DMSO@Zn as the negative electrode, 3 mol / L zinc trifluoromethanesulfonate solution as the electrolyte, and the sodium vanadate positive electrode sheet prepared in Example 1 as the positive electrode, the button battery 2 was assembled and the charge-discharge test was carried out.
[0076] Test results show that at 1A g -1 At a current density of 307mAh g, the coin cell 2 can -1 The discharge specific capacity of 2500 cycles was achieved, and the capacity retention rate was 65% after 2500 cycles.
PUM
| Property | Measurement | Unit |
|---|---|---|
| Thickness | aaaaa | aaaaa |
| Discharge specific capacity | aaaaa | aaaaa |
| Discharge specific capacity | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More