Qiu Dan-Feng, Ma Xiao, Zhang Jing-Dong, Lin Zi-Xia, Zhao Bin
Key Laboratory of Radar Imaging and Microwave Photonics (Nanjing Univ. Aeronaut. Astronaut.), Ministry of Education, College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, No. 29 Yu Dao Street, Nanjing, 210016, China.
National Laboratory of Microstructures and School of Electronic Science and Engineering, Nanjing University, No. 22 Hankou Road, Nanjing, 210093, China.
Nanoscale Res Lett. 2018 Sep 10;13(1):275. doi: 10.1186/s11671-018-2699-7.
Sodium-ion batteries have been widely used in energy storage owing to its high sodium content and low cost. This study proves that mesoporous silicon microspheres (MSMs) with the homogeneously distributed mesopores ranging from 1 to 10 nm can be used as anodes of NIBs. In situ magnesiothermic reduction of silicon oxide was carried out to synthesize the MSM samples. An anode in NIBs was tested, and it was observed that the MSMs sample which was calcined at 650 °C had a good rate performance of 160 mAh g at 1000 mAg and a high reversible capacity of 390 mAh g at 100 mAg after 100 cycles. Moreover, its long-term cycling performance was 0.08 mAh g decay per cycle for 100 cycles, which was quite excellent. MSMs have high reversibility, good cycling performance, and excellent rate capability, which are related to its ultrafine particle size and mesoporous morphology.
钠离子电池因其高钠含量和低成本而在能量存储中得到广泛应用。本研究证明，具有1至10纳米均匀分布中孔的介孔硅微球（MSMs）可作为钠离子电池的阳极。通过原位镁热还原氧化硅来合成MSM样品。对钠离子电池中的阳极进行了测试，观察到在650℃下煅烧的MSMs样品在1000 mAg时具有160 mAh g的良好倍率性能，在100 mAg下经过100次循环后具有390 mAh g的高可逆容量。此外，其长期循环性能在100次循环中每循环衰减0.08 mAh g，相当优异。MSMs具有高可逆性、良好的循环性能和出色的倍率性能，这与其超细粒径和介孔形态有关。
