Journal Article

FZJ-2018-02573

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png High Capacity, Dendrite-Free Growth, and Minimum Volume Change Na Metal Anode

Sun, X. (Corresponding author) ; Zhao, Y. ; Yang, X. ; Kuo, L.-Y. ; Kaghazchi, P.FZJ* ; Sun, Q. ; Liang, J. ; Wang, B. ; Lushington, A. ; Li, R. ; Zhang, H.

2018
Wiley-VCH Weinheim

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Please use a persistent id in citations: doi:10.1002/smll.201703717

Abstract: Na metal anode attracts increasing attention as a promising candidate for Na metal batteries (NMBs) due to the high specific capacity and low poten-tial. However, similar to issues faced with the use of Li metal anode, crucial problems for metallic Na anode remain, including serious moss-like and den-dritic Na growth, unstable solid electrolyte interphase formation, and large infinite volume changes. Here, the rational design of carbon paper (CP) with N-doped carbon nanotubes (NCNTs) as a 3D host to obtain Na@CP-NCNTs composites electrodes for NMBs is demonstrated. In this design, 3D carbon paper plays a role as a skeleton for Na metal anode while vertical N-doped carbon nanotubes can effectively decrease the contact angle between CP and liquid metal Na, which is termed as being “Na-philic.” In addition, the cross-conductive network characteristic of CP and NCNTs can decrease the effective local current density, resulting in uniform Na nucleation. Therefore, the as-prepared Na@CP-NCNT exhibits stable electrochemical plating/strip-ping performance in symmetrical cells even when using a high capacity of 3 mAh cm−2 at high current density. Furthermore, the 3D skeleton structure is observed to be intact following electrochemical cycling with minimum volume change and is dendrite-free in nature.

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Contributing Institute(s):

1. Werkstoffsynthese und Herstellungsverfahren (IEK-1)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

Appears in the scientific report 2018

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Database coverage:
; Current Contents - Physical, Chemical and Earth Sciences ; IF >= 5 ; JCR ; NCBI Molecular Biology Database ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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