skip to main content

DOE PAGESDOE PAGES

Title: A three-dimensional carbon nano-network for high performance lithium ion batteries

Three-dimensional (3D) network structure has been envisioned as a superior architecture for lithium ion battery (LIB) electrodes, which enhances both ion and electron transport to significantly improve battery performance. Herein, a 3D carbon nano-network is fabricated through chemical vapor deposition of carbon on a scalably manufactured 3D porous anodic alumina (PAA) template. As a demonstration on the applicability of 3D carbon nano-network for LIB electrodes, the low conductivity active material, TiO2, is then uniformly coated on the 3D carbon nano-network using atomic layer deposition. High power performance is demonstrated in the 3D C/TiO2 electrodes, where the parallel tubes and gaps in the 3D carbon nano-network facilitates fast Li ion transport. A large areal capacity of ~0.37 mAh·cm–2 is achieved due to the large TiO2 mass loading in the 60 µm-thick 3D C/TiO2 electrodes. At a test rate of C/5, the 3D C/TiO2 electrode with 18 nm-thick TiO2 delivers a high gravimetric capacity of ~240 mAh g–1, calculated with the mass of the whole electrode. A long cycle life of over 1000 cycles with a capacity retention of 91% is demonstrated at 1C. In this study, the effects of the electrical conductivity of carbon nano-network, ion diffusion, and the electrolyte permeabilitymore » on the rate performance of these 3D C/TiO2 electrodes are systematically studied.« less
Authors:
 [1] ;  [2] ;  [3] ;  [3] ;  [3] ;  [1] ;  [1]
  1. Univ. of Colorado, Boulder, CO (United States)
  2. Chinese Academy of Sciences, Zhejiang (China)
  3. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
OSTI Identifier:
1141026
Report Number(s):
SAND--2014-1959J
Journal ID: ISSN 2211-2855; PII: S2211285514203181
Grant/Contract Number:
AC04-94AL85000
Type:
Accepted Manuscript
Journal Name:
Nano Energy
Additional Journal Information:
Journal Volume: 11; Journal Issue: C; Related Information: Proposed for publication in Advanced Energy Materials.; Journal ID: ISSN 2211-2855
Publisher:
Elsevier
Research Org:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; 77 NANOSCIENCE AND NANOTECHNOLOGY three-dimensional network; carbon nano-network; Li-ion battery; anode