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.
The prevalence of indoor air pollution, primarily stemming from human activities, has led to increasing concerns regarding elevated CO2 concentrations in indoor environments. Prolonged exposure to such environments has been linked to reduced productivity, headaches, nausea, and more severe health risks, such as Sick Building Syndrome. Consequently, the development of efficient methods to reduce CO2 concentrations in indoor air is of utmost importance. This review offers a comprehensive analysis of cutting-edge indoor CO2 capture technologies, delving into the adsorption performance of solvents produced via various techniques. Our findings highlight the emergence of innovative materials that significantly enhance the indoor adsorption process; nevertheless, further investigation into reaction kinetics and stability remains imperative for continued progress. Among the methods assessed, Thermal Swing Adsorption and Wet Impregnation demonstrate superior suitability for indoor CO2 capture applications. Importantly, this review also emphasizes the potential of novel ventilation strategies, incorporating both internal ventilation and CO2 capture devices, to not only reduce indoor CO2 concentrations but also promote energy efficiency in buildings.
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