Graphene and Carbon Nanotube Dual-Decorated SiO_x Composite Anode Material for Lithium-Ion Batteries

Abstract

In this study, a three-dimensional graphene- and carbon nanotube (CNT)-decorated SiO x composite material (SiO x -Gr-CNT) was synthesized. The dual carbon components were introduced by a simple one-step method of high-energy ball milling. The corresponding SiO x -Gr-CNT composite electrode exhibited superior lithium storage performance because the graphene and CNT components form a flexible network with high conductivity decorating on SiO x . The network is beneficial for the improvement of the conductivity of SiO x particles. The mechanical flexibility of the graphene and CNT components had a negligible volume effect, which could effectively suppress the volume expansion of SiO x and assist to form a durable solid electrolyte interphase film by separating SiO x particles from the electrolyte. Thus, the electrochemical properties of the corresponding SiO x -Gr-CNT composite electrode were effectively enhanced with a large reversible specific capacity of 1015.1 mA h g–1, which was maintained at 1046.6 mA h g–1 after cycling of 100 cycles with a capacity remaining exceeding 100% under a current density of 100 mA g–1. The SiO x -Gr-CNT composite electrode also exhibited outstanding cycling performance under a large current density of 1 A g–1 with more than 800 mA h g–1 reversible specific capacity even after 200 cycles. The method used for the combination of the SiO x -Gr-CNT composite anode material is simple and mass productive and thus is promising for practical application.

Recent advances of SiO x -based anodes for sustainable lithium-ion batteries

“…Therefore, it is very important for the design of carbon that introducing as little carbon as possible to get the carbon layer that matches the material particle size and has uniform and orderly morphology. neighboring CNTs, which improved the maintenance of conductive paths and structural integrity of SiO x [102]. The stable cycling performance of the composites can be maintained with the retention of 88% of its initial charge capacity after 100 cycles (Fig.…”

Preparation and ablative behaviors of carbon fiber‐reinforced polydimethylsiloxane‐co‐poly(silylene acetylenearyleneacetylene) composites

“…On the surface of the composites, the binding energy of C atoms at 284.33, 284.82, 286.59, and 288.93 eV are attributed to the various chemical structures of the C atoms derived from CSi, CC, CO, and CO, respectively. The Si atom in the different chemical structure can be divided into (CH 3 ) 2 SiC, (CH 3 ) 2 SiO 2/2 , (CH 3 )SiO 3/2 , SiO 1.5 , SiO 2 , whose binding energies are at 101.51, 102.10, 102.90, 103.62, and 104.69 eV, respectively 34 . The changes of C and Si atoms in various structures on the surface of the composites before and after the ablation are summarized in Table 9 and Table 10.…”

“…On the surface of the composites, the binding energy of C atoms at 284. 33 34 The changes of C and Si atoms in various structures on the surface of the composites before and after the ablation are summarized in Table 9 and Table 10. By comparison, the Si atom in the structure of (CH 3 ) 2 SiC on the surface of T700CF/PPSOA-1 is higher than that on the surface of T700CF/PPSOA-2 since the block PSA in the PPSOA-1 copolymer is larger than that in the PPSOA-2 before the ablation.…”

Review on Improving the Performance of SiOx Anodes for a Lithium-Ion Battery through Insertion of Heteroatoms: State of the Art and Outlook

“…Previous research has indicated that the use of carbon-based materials is essential for improving the performance and stability of these anodes. 41 He et al 42 have provided a comprehensive review of the progress made with silicon− graphite materials and have proposed several promising directions for their industrialization. One strategy that shows great potential is the utilization of three-dimensional (3D) cross-linked binders.…”

“…The successful implementation of silicon- and SiO x -based anodes remains a significant challenge for achieving industrial application cycles. Previous research has indicated that the use of carbon-based materials is essential for improving the performance and stability of these anodes . He et al .…”