20 / 36
Page 54
Notes:
conferenceseries
.com
Joint Conference
July 17-18, 2017 Chicago, USA
International Conference on
DIAMOND AND CARBON MATERIALS & GRAPHENE AND SEMICONDUCTORS
Volume 6, Issue 6 (Suppl)
J Material Sci Eng, an open access journal
ISSN: 2169-0022
Diamond and Carbon 2017 & Graphene 2017
July 17-18, 2017
Porous worm-like NiMoO
4
coaxially decorated electrospun carbon nanofibers as binder-free high
performance electrodes for supercapacitors and lithium-ion batteries
Song Y
1
, Tian X-D
1,2
, Li X
1,2
, Yang T
1,2
, Liu Z-J
1
and
Guo Q-G
1
1
CAS Key Laboratory of Carbon Materials, China
2
University of Chinese Academy of Sciences, China
R
ecently, various nanoscale NiMoO
4
structures have been synthesized and evaluated as electrode materials in both SCs and
LIBs due to the relatively low cost, abundant availability, environmental benignity and inherent electrochemical advantages.
Given the NiMoO
4
prepared in these works exhibits small surface area and dense structure, which impedes the fast ions
transport and makes it difficult to alleviate the volume change. Therefore, it will be of great significance to grow porous NiMoO
4
nanostructure directly on flexible substrates for effective energy storage. As another carbon textile, electrospun carbon nano
fibers (ECNFs) exhibit smaller diameter and lighter mass when compared with conventional carbon cloth, which is favorable to
increase the loading of NiMoO
4
, shorten ion/electron transport pathways and improve the utilization of NiMoO
4
. The peculiar
architectures consisting of electrospun carbon nanofibers coaxially decorated by porous worm-like NiMoO
4
were successfully
fabricated for the first time to address the poor cycling stability and inferior rate capability of state-of-the-art NiMoO
4
-based
electrodes. The porous worm-like structure endows the electrode high capacitance/capacity due to large specific surface area
and short electron/ion diffusion channels. Moreover, the robust integrated electrodes with sufficient internal spaces can self-
accommodate volume variance during charge/discharge processes, which is beneficial to the structural stability and integrity.
By the virtue of rational design of the architecture, the hybrid electrode delivered high specific capacitance (1088.5 F g-1 at 1
A g-1), good rate capability (860.3 F g-1 at 20 A g-1) and long lifespan (73.9% capacitance retention after 5000 cycles at 10 A
g-1) when applied as supercapacitor electrode. For lithium-ion battery application, the electrode exhibited a high reversible
capacity of 689.7 mAh g-1 even after 150 continuous cycles at a current density of 1 A g-1.
Biography
Song Y has her expertise in preparation and application of porous carbon and energy storage materials. She is Project Leader of the National 863 project, the
University of Science and Technology Beijing, key research plan of Shanxi Province, etc. She made a breakthrough in the development of preparation of high
performance carbon/silicon composite anode, the pore structure control of porous nano-carbon fibers. She got several awards, such as Lu Jiaxi Young Talent Award
of CAS in 2009, second prize for Science Award in Shanxi Province in 2013, first prize for National Defense Science and Technology Innovation award in Shanxi
Province in 2014 and so on.
yansong1026@126.comSong Y et al., J Material Sci Eng 2017, 6:6(Suppl)
DOI: 10.4172/2169-0022-C1-076