TY - GEN
T1 - Binder-free freestanding flexible Si nanoparticles-multi-walled carbon nanotubes composite anodes for Li-ion batteries
AU - Yao, K.
AU - Zheng, J. P.
AU - Liang, R.
N1 - Publisher Copyright:
© The Electrochemical Society.
PY - 2016
Y1 - 2016
N2 - Binder-free freestanding flexible Si nanoparticles-multi-walled carbon nanotubes (SiNPs-MWNTs) composite paper anodes have been prepared by simple, inexpensive, and scalable approach of ultra-sonication and pressure filtration. The 3D network of MWNTs forms a continuous conductive pathway within the composite structure, which ensures sufficient electrical conductivity, holds the particles together, and alleviates volume expansion of Si. Through control of Si/C weight ratio, we found out the SiNPs-MWNTs electrode with 3:2 Si/C ratio exhibits the optimal balance between high capacity of SiNPs and high conductivity and structural stabilization quality of MWNTs, leading to high rate capability as well as specific capacity and cycle performance superior to conventional slurry-cast SiNPs anode using binder and Cu current collector. After 100 cycles, the electrode retains capacity of 1170 mAh/g at 100 mA/g. The freestanding feature of our electrode eliminates the non-active mass, which is promising for enhanced capacity and energy density of Li-ion cells.
AB - Binder-free freestanding flexible Si nanoparticles-multi-walled carbon nanotubes (SiNPs-MWNTs) composite paper anodes have been prepared by simple, inexpensive, and scalable approach of ultra-sonication and pressure filtration. The 3D network of MWNTs forms a continuous conductive pathway within the composite structure, which ensures sufficient electrical conductivity, holds the particles together, and alleviates volume expansion of Si. Through control of Si/C weight ratio, we found out the SiNPs-MWNTs electrode with 3:2 Si/C ratio exhibits the optimal balance between high capacity of SiNPs and high conductivity and structural stabilization quality of MWNTs, leading to high rate capability as well as specific capacity and cycle performance superior to conventional slurry-cast SiNPs anode using binder and Cu current collector. After 100 cycles, the electrode retains capacity of 1170 mAh/g at 100 mA/g. The freestanding feature of our electrode eliminates the non-active mass, which is promising for enhanced capacity and energy density of Li-ion cells.
UR - https://www.scopus.com/pages/publications/85010773122
U2 - 10.1149/07208.0067ecst
DO - 10.1149/07208.0067ecst
M3 - Conference contribution
AN - SCOPUS:85010773122
SN - 9781623323776
T3 - ECS Transactions
SP - 67
EP - 86
BT - Joint General Session
A2 - Kostecki, R.
A2 - Manivannan, M.
A2 - Narayanan, S.
PB - Electrochemical Society Inc.
T2 - Joint General Session: Batteries and Energy Storage -and- Fuel Cells, Electrolytes, and Energy Conversion - 229th ECS Meeting
Y2 - 29 May 2016 through 2 June 2016
ER -