A high-performance Li-ion anode from direct deposition of Si nanoparticles

作者：Xu, Yaolin; Swaans, Ellie; Chen, Sibo; Basak, Shibabrata; Harks, Peter Paul R. M. L.; Peng, Bo; Zandbergen, Henny W.; Borsa, Dana M.; Mulder, Fokko M.^*

来源：Nano Energy, 2017, 38: 477-485.

DOI：10.1016/j.nanoen.2017.06.011

• Li ion battery
• Si nanoparticles
• Direct deposition
• One-off SEI formation

Nanostructured silicon has been intensively investigated as a high capacity Li-ion battery anode. However, the commercial introduction still requires advances in the scalable synthesis of sophisticated Si nanomaterials and electrodes. Moreover, the electrode degradation due to volume changes upon de-/lithiation, low areal electrode capacity, and application of large amounts of advanced conductive additives are some of the challenging aspects. Here we report a Si electrode, prepared from direct deposition of Si nanoparticles on a current collector without any binder or conducting additives, that addresses all of the above issues. It exhibits an excellent cycling stability and a high capacity retention taking advantages of what appears to be a locally protective, yolk-shell reminiscent, solid electrolyte interphase (SEI) formation. Cycling an electrode with a Si nanoparticle loading of 2.2 mg cm(-2) achieved an unrivalled areal capacity retention, specifically, up to 4.2 mAh cm(-2) and similar to 1.5 mAh cm(-2) at 0.8 mA cm(-2) and 1.6 mA cm(-2), respectively.

• 出版日期2017-8
• 单位中国人民大学