The growing global demands of high-safety, low-cost and high working voltage energy storage devices trigger great interests in novel batteries beyond state-of-the-art lithium-ion battery. Herein, we firstly fabricate a novel rechargeable dual-ion cell with graphite cathode and Si [email protected] ([email protected]) composite anode in a LiPF₆-based organic electrolyte. The graphene layers anchored onto Si nanospheres surface can accommodate the volume expansion and improve the electrical conductivity of Si nanospheres. The cell shows stable long-term cycling and excellent rate performance with a high discharge capacity of 100 mA h g⁻¹ at the current density of 100 mA g⁻¹ after 1000 cycles. Moreover, the cell operates a high working voltage of >4.2 V, enabling a higher energy density. Our result may open a new paradigm for novel electrochemical cell technologies and applications.

全球对高安全性，低成本和高工作电压储能设备的需求不断增长，这引发了人们对新型电池的兴趣，而这种新型电池已超越了最新的锂离子电池。本文中，我们首先在LiPF ₆基有机电解质中制造了一种新型的可充电双离子电池，该电池具有石墨阴极和Si [受电子邮件保护]（[受电子邮件保护]）复合阳极。锚固在Si纳米球表面上的石墨烯层可以适应体积膨胀并提高Si纳米球的电导率。细胞显示长期稳定的循环并用的100毫安ħg的高放电容量优异的倍率性能^-1在100mA克的电流密度^-1经过1000个周期。此外，该电池的工作电压> 4.2 V，可实现更高的能量密度。我们的结果可能会为新型电化学电池技术和应用开辟新的范例。