Nitrogen-doped 3D nanocarbon with nanopore defects as high-capacity and stable anode materials for sodium/lithium-ion batteries. (June 2020)

• Record Type: Journal Article
• Authors: Sun, Tao; Liu, Guangyou; Du, Lingyu; Bu, Yongfeng; Tian, Bingbing
• Is Part Of: Materials today energy. Volume 16(2020)
• Publication Date: 2020-06
• Subjects: 3D nanocarbon -- Nitrogen doping -- Nanopore defects -- Sodium-ion batteries -- Lithium-ion batteries; Energy development -- Periodicals; Energy industries -- Periodicals; Power resources -- Periodicals; Energy policy -- Periodicals; Energy development; Energy industries; Energy policy; Power resources; Electronic journals; Periodicals; 621.042
• DOI: 10.1016/j.mtener.2020.100395
• Languages: English
• ISSNs: 2468-6069

Abstract

Abstract: Carbon materials are among the most important materials used for anodes in rechargeable batteries due to their extensive resources and good cycling stability. However, the electrochemical performance of carbon-based anodes is closely related with their electronic states and morphologies/microstructures. Herein, we present a simple approach to synthesize a nitrogen-doped 3D nanocarbon (N-Carbon) with nanopore defects as high-capacity and stable anodes for sodium/lithium-ion batteries. This carbon material well inherits the unique nanosheet-like morphology of the template, which is composed of twisted-interconnected cuboidal hollow nanocages with a large number of nanopores across the shells. N-Carbon with integration of N heteroatom and 3D porous structure exhibits high reversible capacities of sodium-ion batteries, up to 401.9 and 311.7 mAh g −1 at 0.1 and 0.5 A g −1 after 100 cycles, respectively. This unique carbon material simultaneously exhibits excellent rate capability and cycling stability, with reversible capacities of 199.7 and 97.9 mAh g −1 at large current densities of 1 and 5 A g −1 even after 10, 000 cycles, respectively. Moreover, N-Carbon also exhibits high capacity of 709 mAh g −1 for lithium-ion batteries after 2500 cycles at 10 A g −1 . The excellent reversibility, rate capability, and cycling stability are attributed to this unique N-Carbon integrating into rich nitrogen-doped induced ion-storage sites and its relative ordered 3D pore structure. Highlights: N doping and nanopore defects for carbon material are formed in one step. 3D nanocarbon presents a high performance of capacity and cycling stability. In-situ XRD patterns reveal the mechanism of carbon as anode for Na-ion batteries. N doping and morphological regulation jointly contribute to excellent performance. This work provides an efficient strategy to construct advanced carbon anodes.