High areal capacity battery electrodes enabled by segregated nanotube networks
High thickness and specific capacity leads to areal capacities of up to 45 and 30 mAh cm−2 for anodes and cathodes, respectively. Combining optimized composite anodes and cathodes yields full cells with state-of-the-art areal capacities (29 mAh cm−2) and specific/volumetric energies (480 Wh kg−1 and 1,600 Wh l−1).
Rational design of a high-energy NCA cathode for Li-ion batteries
Replacing Denka black with SWCNT allows to reduce the carbon content to 0.2 wt% to further increase the energy density, and 2 wt% of PVDF was shown to benefit the cycling stability due to the mitigated PVDF-induced side reactions from its direct contact with NCA particles.
Quantifying the effect of electrical conductivity on the rate-performance of nanocomposite battery electrodes
100 μm thick electrodes with mass loadings 2 of ∼15 mg/cm2 were produced. While carbon black or graphene loadings of >10 wt % are required to reach OOP conductivities of 1 S/ m, this level can be achieved with ∼1 wt % of carbon nanotubes.
Constructing a Highly Efficient Aligned Conductive Network to Facilitate Depolarized High-Areal-Capacity Electrodes in Li-Ion Batteries
With minimum inactive components (i.e., binder and conductive agents), the proposed electrode structure delivers good cycling stability and rate capability under high areal loading (as high as 200 mg cm−2).