Sacrificial Template Strategy toward a Hollow LiNi1/3Co1/3Mn1/3O2 Nanosphere Cathode for Advanced Lithium-Ion Batteries
| Autor: | Shuiyun Shen, Aiming Wu, Christian M. Lastoskie, Yao Zhang, Wansen Zhang, Ruofei Wu, Xiaohui Yan, Junliang Zhang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
General Chemical Engineering chemistry.chemical_element Nanotechnology 02 engineering and technology 010402 general chemistry Electrochemistry 01 natural sciences Article Ion law.invention lcsh:Chemistry law medicine Polyvinylpyrrolidone General Chemistry 021001 nanoscience & nanotechnology Cathode 0104 chemical sciences chemistry lcsh:QD1-999 Lithium 0210 nano-technology Carbon medicine.drug Template method pattern |
| Zdroj: | ACS Omega, Vol 2, Iss 11, Pp 7593-7599 (2017) ACS Omega |
| ISSN: | 2470-1343 |
| Popis: | In this work, a hollow LiNi1/3Co1/3Mn1/3O2 (H-NCM) nanosphere cathode with excellent electrochemical performance is developed for lithium-ion batteries. Preparation of the H-NCM nanospheres involves the sacrificial template method, in which carbon nanospheres work as the template and polyvinylpyrrolidone works as an additive. Structural and morphological analyses show that the as-prepared H-NCM nanospheres are highly uniform with diameters of approximately 50 nm and wall thicknesses of 10 nm. Electrochemical tests demonstrate that the H-NCM cathode not only manifests outstanding rate performance in the potential window of 2.5–4.5 V with high reversible specific capacities of 205.6, 194.9, 177.8, 165.9, 151.7, 126.0, and 115.3 mA h g–1 at 0.1, 0.2, 0.5, 1, 2, 5, and 10 C, respectively, but also delivers excellent stability with a capacity retention of 60.1% at 10 C after 2000 cycles. The superior electrochemical performance of the H-NCM cathode can be put down to the distinctive hollow interior structure with thin nanostructured walls, which can synergistically benefit the significantly enhanced rate capability and cycling stability. |
| Databáze: | OpenAIRE |
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