Design Nitrogen (N) and Sulfur (S) Co‐Doped 3D Graphene Network Architectures for High‐Performance Sodium Storage. Issue 10 (29th December 2017)

• Record Type: Journal Article
• Authors: Jiang, Yu; Wu, Ying; Chen, Yuexi; Qi, Zhenyu; Shi, Jinan; Gu, Lin; Yu, Yan
• Is Part Of: Small. Volume 14:Issue 10(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-12-29
• Subjects: MoS2 -- Na3V2(PO4)3 -- N, S co‐doped 3D porous graphene frameworks -- sodium‐ion batteries -- TiO2; Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.201703471
• Languages: English
• ISSNs: 1613-6810

Abstract

Abstract: To develop high‐performance sodium‐ion batteries (NIBs), electrodes should possess well‐defined pathways for efficient electronic/ionic transport. In this work, high‐performance NIBs are demonstrated by designing a 3D interconnected porous structure that consists of N, S co‐doped 3D porous graphene frameworks (3DPGFs‐NS). The most typical electrode materials (i.e., Na3 V2 (PO4 )3 (NVP), MoS2, and TiO2 ) are anchored onto the 3DPGFs‐NS matrix (denoted as NVP@C@3DPGFs‐NS; MoS2 @C@3DPGFs‐NS and TiO2 @C@3DPGFs‐NS) to demonstrate its general process to boost the energy density of NIBs. The N, S co‐doped porous graphene structure with a large surface area offers fast ionic transport within the electrode and facilitates efficient electron transport, and thus endows the 3DPGFs‐NS‐based composite electrodes with excellent sodium storage performance. The resulting NVP@C@3DPGFs‐NS displays excellent electrochemical performance as both cathode and anode for NIBs. The MoS2 @C@3DPGFs‐NS and TiO2 @C@3DPGFs‐NS deliver capacities of 317 mAhg −1 at 5 Ag −1 after 1000 cycles and 185 mAhg −1 at 1 Ag −1 after 2000 cycles, respectively. The excellent long cycle life is attributed to the 3D porous structure that could greatly release mechanical stress from repeated Na + extraction/insertion. The novel structure 3D PGFs‐NS provides a general approach to modify electrodes of NIBs and holds great potential applications in other energy storage fields. Abstract : The most typical electrode materials (i.e., Na3 V2 (PO4 )3 (NVP), MoS2, and TiO2 ) are anchored onto the N, S co‐doped 3D porous graphene frameworks matrix to demonstrate its general process to boost the energy density of Na‐ion batteries.