CO₂ Conversion into N-Doped Porous Carbon-Encapsulated NiO/Ni Composite Nanomaterials as Outstanding Anode Material of Li Battery

• Main Authors: Yayong Li, Chunxiao Xu, Kaiyuan Liu, Pengwan Chen, Xin Gao
• Format: Article
• Language: English
• Published: MDPI AG 2020-07-01
• Series: Nanomaterials
• Subjects: combustion synthesis; CO₂ reduction; porous carbon; nickel oxide; hydrazine hydrate; lithium ion battery
• Online Access: https://www.mdpi.com/2079-4991/10/8/1502

N-doped porous carbon encapsulated NiO/Ni composite nanomaterials (N-doped NiO/Ni@C) was successfully obtained by a one-step solution combustion method. This study demonstrates a one-step combustion method to synthesize n-doped porous carbon encapsulated NiO/Ni composite nanomaterials, using carbon dioxide as the carbon source, nickel nitrate as the nickel source, and hydrazine hydrate as the reaction solution. Spherical NiO nanoparticles with a particle size of 20 nm were uniformly distributed in the carbon matrix. The load of NiO/Ni can be controlled by the amount of nickel nitrate. The range of carbon content of recovered samples is 69–87 at%. The content of incorporated nitrogen for recovered samples is 1.94 at%. As the anode of lithium ion battery, the composite material exhibits high capacity, excellent multiplier performance and stable circulation performance. N-doped NiO/Ni@C-2 was applied to lithium ion batteries, and its reversible capacity maximum is 980 mAh g⁻¹ after 100 cycles at the current density of 0.1 A g⁻¹. Its excellent electrochemical properties imply its high potential application for high-performance lithium-ion battery anode materials.