Li-rich cathodes for rechargeable Li-based batteries: reaction mechanisms and advanced characterization techniques

Abstract

Due to their high specific capacities beyond 250 mAh g-1, lithium-rich oxides have been considered as promising cathodes for the next generation power batteries, bridging the capacity gap between traditional...

Engineering Na+-layer spacings to stabilize Mn-based layered cathodes for sodium-ion batteries

“…Synchrotron X-ray is much brighter than the lab-source X-ray. Moreover, the transmission mode of the in situ synchrotron XRD setup strengthens the intensity of ( hkl ) ( h + k ≠ 0) diffraction peaks 9 . Therefore, in situ synchrotron XRD ( λ = 0.6887 Å) was further utilized to track the structural changes of S-NMO.…”

“…According to the redox and phase transition mechanisms 9 , 13 , 20 , 22 , the pristine Na 0.67 MnO 2 electrode can be briefly separated into three regions: anionic redox region, P2-phase region, and Jahn–Teller distortion region. The anionic redox reactions occur at ~4.0–4.4 V, which are usually accompanied by P–O phase transitions 9 , 20 . At ~2.5–4.0 V, the Na 0.67 MnO 2 electrode shows P2 structure and exhibits fast kinetics and high redox reversibility 20 , 22 .…”

The critical role of inorganic nanofillers in solid polymer composite electrolyte for Li+ transportation

“…To support the above research concepts, several in situ analysis techniques such as solid‐state nuclear magnetic resonance (SS‐NMR), cryogenic electron microscopy, and powder neutron diffraction should be combined with electrochemical characterizations and simulation methodologies. Recently, Zuo et al 140 systematically analyzed and summarized the contribution of the aforementioned in situ characterizations in revealing the structural issues of the electrode in lithium‐based batteries. Hence, to obtain more information about the structural composition variation of SPCE during the cycling process, such application of in situ techniques in SPCE should be fully utilized and developed.…”

Battery cost forecasting: a review of methods and results with an outlook to 2050

“…While both studies assume a similar specific capacity of 140 mA h g À1 , the minimum value obtained from Wentker et al View Article Online cathode active material offers high cycle life and low selfdischarge but its application is mainly limited by the high, cobalt-induced material cost. 108,133 Average prices of NMC and NCA materials range between both aforementioned groups. In addition to the elemental composition, active material prices are influenced by market dynamics, chosen process route, precursor prices, and atmospheric requirements for their production.…”