High voltage Li-ion battery cathode materials with core-shell structure and preparation method thereof
A technology of lithium ion battery and core-shell structure is applied in the field of materials, which can solve the problems of increasing lattice parameters and reducing the cycle performance of materials, and achieves the effects of simple and feasible preparation method, excellent rate performance and cycle performance.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
specific Embodiment approach 1
[0022] Embodiment 1: In this embodiment, electrode materials are prepared according to the following steps:
[0023] Weigh 0.03mol of manganese sulfate, 0.009mol of nickel sulfate and 0.001mol of cobalt sulfate and dissolve it in 1L of deionized water, add 1L of a solution containing 0.09mol of sodium hydroxide to it to obtain a suspension, and then dropwise add 0.5 L containing 0.003mol manganese sulfate and 0.001mol nickel sulfate solution and 0.5L containing 0.008mol sodium hydroxide solution. Filter, wash and dry to obtain a precipitate, mix the precipitate with 0.023mol lithium hydroxide to obtain a precursor, put the above precursor in a muffle furnace, pre-calcinate at 500 °C for 4 h, calcined at 850 °C for 12 h, and then at 650 °C After annealing for 24 h, a core-shell structure positive electrode material for high-voltage lithium-ion batteries was obtained.
specific Embodiment approach 2
[0024] Specific embodiment 2: In this embodiment, electrode materials are prepared according to the following steps:
[0025] Weigh 0.03 mol of manganese sulfate, 0.005 mol of nickel sulfate, 0.0045 mol of nickel nitrate and 0.0005 mol of aluminum chloride, dissolve them in 1 L of deionized water, add 1 L of a solution containing 0.1 mol of sodium hydroxide to it to obtain a suspension, and then add it to the solution. 0.5L solution containing 0.003mol manganese sulfate and 0.001mol nickel sulfate and 0.5L solution containing 0.004mol sodium carbonate were added dropwise to the suspension. Filter, wash, and dry to obtain a precipitate. Mix the precipitate with 0.023 mol of lithium nitrate to obtain a precursor. The above precursor is placed in a muffle furnace, pre-calcined at 400 °C for 4 h, calcined at 800 °C for 20 h, and then calcined at 700 °C. After annealing for 20 h, a core-shell structure positive electrode material for high-voltage lithium-ion batteries was obtained....
specific Embodiment approach 3
[0026] Embodiment 3: In this embodiment, electrode materials are prepared according to the following steps:
[0027] Weigh 0.02mol of manganese nitrate and 0.01mol of manganese chloride, 0.009mol of nickel sulfate and 0.001mol of chromium nitrate, dissolve them in 1L of deionized water, add 1L of a solution containing 0.05mol of sodium carbonate to it to obtain a suspension, and then add to the suspension. 0.5L of a solution containing 0.003mol of manganese sulfate and 0.001mol of nickel sulfate and 0.5L of a solution of 0.004mol of sodium bicarbonate were added dropwise to the turbid liquid. Filter, wash and dry to obtain a precipitate, mix the precipitate with 0.023mol lithium hydroxide to obtain a precursor, put the above precursor in a muffle furnace, pre-calcinate at 500 °C for 4 h, calcined at 850 °C for 12 h, and then at 650 °C After annealing for 24 h, a high-voltage core-shell structure lithium-ion battery cathode material was obtained.
PUM
| Property | Measurement | Unit |
|---|---|---|
| thickness | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More