Multifunctional, robust, light-weight, free-standing MWCNT/phenolic composite paper as anodes for lithium ion batteries and EMI shielding material

Abstract

a Energy density of Li-ion batteries is marred due to the additional weight of copper, which is used as a current collector. In this work, fabrication of strong, graphitized, multiwalled carbon nanotubes (GCNTs)/phenolic composite paper using a new dispersion technique is reported. The composite paper has been used as a free-standing current collector, as well as an anode material for Li-ion batteries, because of its good electrical conductivity of 76 S cm À1 . This highly thin conductive composite paper (thickness 140 mm) also shows efficient electromagnetic interference (EMI) shielding effectiveness of 32.4 dB in Ku-band (12.4-18 GHz). Moreover, structural and morphological studies were carried out using TEM and SEM. The flexural strength of the composite paper was 30 MPa, which is good enough for use as an electrode in batteries. The electrochemical properties of the composite paper were investigated by galvanostatic charge-discharge test. It exhibits a stable reversible specific capacity for more than 45 cycles. EMI shielding effectiveness (SE) was measured using a vector network analyzer, and the total EMI-SE surpasses the value needed for commercial applications.

Ultrathin flexible graphene films with high thermal conductivity and excellent EMI shielding performance using large-sized graphene oxide flakes

“…5d). 1,4,5,11,13,19,20,28,31,32,[35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51] This nding is noteworthy because the LG-4 lm would satisfy several commercial requirements for an EMI shielding material, for example ultrahigh EMI SE (73.7 dB), low density (2.05 g cm À3 ), ultrathin thickness (0.014 mm), anti-corrosion, high exibility and easy fabrication.…”

Development of SnO2/Multiwalled Carbon Nanotube Paper as Free Standing Anode for Lithium Ion Batteries (LIB)

“…Of the many components in LIB, cathode materials have been widely investigated [5][6][7]. The reports on anode are exhaustive [8][9][10] as it is one of the most critical constituent for proper functioning of the cell since it acts as a host for the Li ions. A typical anode should have a high Li storage capacity and good structural stability for long cyclability and cell life.…”

Structural and mechanical properties of free-standing multiwalled carbon nanotube paper prepared by an aqueous mediated process

“…The high aspect ratio enables CNTs to form a free-standing film called ''Bucky paper''. It attracts many researchers to work on its applications in the field of power storage [1], actuators [2], electrodes for Li-ion batteries [3,4,5], electrodes for biosensing applications [6], field emission devices [7], structural [8,9,10,11] and EMI shielding [12,13,14] applications. Flexibility and mechanical strength are the basic requirement for these applications.…”