Doped Si nanoparticles with conformal carbon coating and cyclized-polyacrylonitrile network as high-capacity and high-rate lithium-ion battery anodes. (17th August 2015)

• Record Type: Journal Article
• Authors: Xie, Ming; Piper, Daniela Molina; Tian, Miao; Clancey, Joel; George, Steven M; Lee, Se-Hee; Zhou, Yun
• Is Part Of: Nanotechnology. Volume 26:Number 36(2015)
• Publication Date: 2015-08-17
• Subjects: doped Si -- conformal carbon coating -- cyclized-polyacrylonitrile network -- atomic layer deposition; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/0957-4484/26/36/365401
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: Doped Si nanoparticles (SiNPs) with conformal carbon coating and cyclized-polyacrylonitrile (PAN) network displayed capacities of 3500 and 3000 mAh g −1 at C/20 and C/10, respectively. At 1 C, the electrode preserves a specific discharge capacity of ∼1500 mAh g −1 for at least 60 cycles without decay. Al2 O3 atomic layer deposition (ALD) helps improve the initial Coulombic efficiency (CE) to 85%. The dual coating of conformal carbon and cyclized-PAN help alleviate volume change and facilitate charge transfer. Ultra-thin Al2 O3 ALD layers help form a stable solid electrolyte interphase interface.