It
is a bottleneck issue for state-of-the-art start/stop batteries
used in commercialized electrical vehicles to have a long cycling
life, high power output, and understanding safety performance. In
this work, we fabricate prismatic cells to unravel how these tradeoffs
can be balanced based on the material and cell design. Small-particle
Li[Ni1/3Co1/3Mn1/3]O2 ternary
materials with surface modification and isotropous graphite are respectively
employed as cathode and anode to provide super power density. Ceramic-coated
separators with high permeability and wide-temperature electrolytes
with high conductivities enable the safety and cold cranking performance.
Ultrathin-coating electrodes and whole poles are achieved to shorten
the transferring distance of Li ions and promote the efficiency of
Li intercalation and deintercalation kinetics, which demonstrates
the lower internal resistance and current density. By unlocking charge
transfer limitations, the cell presents a high discharge power density
of >5000 W/kg at 25 °C, a 50% SOC (state of charge), and excellent
cold cranking characteristics at −30 °C. A capacity retention
of 3 C (100% depth of discharge, DoD) cycling approaches 80% over
6800 cycles at 25 °C and 4300 cycles at 45 °C. Also, a capacity
retention of cycling at room temperature according to worldwide light
vehicle test procedures reaches up to 92.3% over 6000 cycles with
the energy throughput of 614.5 kWh and direct charge internal resistance
does not soar with the cycling ongoing. The mechanism of the capacity
loss is dissolved Ni, Co, and Mn, which results in irreversible loss
of Li. The cell shows high safety characteristics by passing the 3
C overcharge and nail penetration tests. It is evident that the reported
cell can be a promising commercialized candidate for 48 V start/stop
and hybrid electric vehicle solutions.
Solid polyamine as promising adsorbents were employed to reversible capture CO2 from humidity flue gas, and release CO2 at lower regeneration temperature (348K) with limited volatile and degradation of amine....
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