| Autor: |
WANG, Wencong, HANZAWA, Hiromasa, MACHIDA, Ken-ichi, MIYAZAKI, Kohei, ABE, Takeshi |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
Electrochemistry. 90(1) |
| ISSN: |
1344-3542 |
| Popis: |
A lithium-rich layered structure in lithium-ion batteries (LIBs) has attracted much attention due to its high capacity of over 250 mAhg⁻¹ after activation. This could satisfy the requirements of next-generation energy-storage devices. However, a spinel-like impurity phase that forms from the pristine layered structure during cycling is considered to be harmful to the structure stability and Li⁺ mobility, resulting in undesired electrochemical performance. In this study, nanorod-like Li₁.₂Ni₀.₂Mn₀.₆O₂ with a three-dimensional architecture was synthesized by evaporative-crystallization with as-prepared nano-MnO₂ as a hard template. The structure stability and Li⁺ mobility of the nanorod-like Li₁.₂Ni₀.₂Mn₀.₆O₂ was improved by the addition of an appropriate molar ratios of (La, Zr) co-dopants. This combination exhibited outstanding capacity retention of 80.9% with a stable discharge capacity of 102 mAh g⁻¹ after 300 cycles under a high current density of 1000 mAg⁻¹ (corresponding to S C). This study suggests that the use of a multi-prong strategy that combines morphology control and co-doping should be an effective method for improving the high-rate performance of Li-rich materials. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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