2 research outputs found
Toward Improved Alkaline Membrane Fuel Cell Performance Using Quaternized Aryl-Ether Free Polyaromatics
Toward Improved Alkaline Membrane Fuel Cell Performance
Using Quaternized Aryl-Ether Free Polyaromatic
Graphene Oxides Used as a New “Dual Role” Binder for Stabilizing Silicon Nanoparticles in Lithium-Ion Battery
For the first time,
we report that graphene oxide (GO) can be used as a new “dual-role”
binder for Si nanoparticles (SiNPs)-based lithium-ion batteries (LIBs).
GO not only provides a graphene-like porous 3D framework for accommodating
the volume changes of SiNPs during charging/discharging cycles, but
also acts as a polymer-like binder that forms strong chemical bonds
with SiNPs through its Si–OH functional groups to trap and
stabilize SiNPs inside the electrode. Leveraging this unique dual-role
of GO binder, we fabricated GO/SiNPs electrodes with remarkably improved
performances as compared to using the conventional polyvinylidene
fluoride (PVDF) binder. Specifically, the GO/SiNPs electrode showed
a specific capacity of 2400 mA h g<sup>–1</sup> at the 50th
cycle and 2000 mA h g<sup>–1</sup> at the 100th cycle, whereas
the SiNPs/PVDF electrode only showed 456 mAh g<sup>–1</sup> at the 50th cycle and 100 mAh g<sup>–1</sup> at 100th cycle.
Moreover, the GO/SiNPs film maintained its structural integrity and
formed a stable solid–electrolyte interphase (SEI) film after
100 cycles. These results, combined with the well-established facile
synthesis of GO, indicate that GO can be an excellent binder for developing
high performance Si-based LIBs