Recently,
the development of silicon-based anodes for lithium-ion batteries
has attracted tremendous attention for overcoming the disadvantages
of commercial graphite-based anodes. In this work, we suggest a chemical
methodology of synthesizing silicon–carbon composite anodes,
with capacity values of 763 and 182 mAh/g at current densities of
0.1 and 5 A/g, respectively. An electrostatic assembly technique is
designed to be triggered by a cationic polyelectrolyte, poly(ethylenimine),
for negatively charged silicon nanoparticles and graphene oxides.
Amine-functionalized carbon nanotubes are synthesized in a nondestructive
fashion and incorporated additionally to provide intraconnected conductive
pathways between neighboring composite materials. It is revealed that
the electrochemical performance of intraconnected composite materials
is determined by the chemical/physical factors of constituent compartments.
The applicability toward all-solid-state batteries is also suggested
with usage of a solid polymer electrolyte synthesized from a mixture
of bisphenol A ethoxylate diacrylate, polyethylene glycol dimethyl
ether, tert-butyl peroxypivalate, and bis(trifluoromethane)sulfonimide
lithium salt.