Strategies for improving the cyclability and thermo-stability of LiMn₂O₄-based batteries at elevated temperatures

Abstract

The progress in understanding and modifying LiMn2O4-based batteries from various aspects are systematically and comprehensively summarized in this review.

Preparation of LiBOB via rheological phase method and its application to mitigate voltage fade of Li1.16[Mn0.75Ni0.25]0.84O2cathode

“…12 Therefore, research interests have been transferred to focus on the application of LiBOB as functional electrolyte additive. [13][14][15] The high-energy lithium-rich cathode Li 1+x [Ni y Mn 1-y ] 1-x O 2 is believed to be a promising next generation cathode material due to its high specific capacity (>250 mAh/g) with larger charging voltages (>4.5 V vs. Li/Li + ). 16 In our work, LiBOB sample obtained via rheological phase reaction method (r-LiBOB) was evaluated by comparing with the commercial sample (c-LiBOB, Chemtall) and the one prepared from solid-state reaction method (s-LiBOB).…”

Agarose-biofunctionalized, dual-electrospun heteronanofiber mats: toward metal-ion chelating battery separator membranes

“…[11][12][13] Specically, the Mn 2+ ions dissolved from LMO migrate through the electrolyte and thus deposit as metallic Mn on the anode surface. For example, spinel lithium manganese oxide (LiMn 2 O 4 , LMO) 9,10 has attracted great attention as a promising cathode material owing to its good safety, rate performance and natural abundance, especially for large-scale energy applications such as EVs and ESSs.…”

“…Cell performance of the AHM separator (vs. PE separator): (a) charge/discharge profiles with cycling (up to 100 cycles) at 60 C; (b) high-temperature (60 C) capacity retention as a function of cycle number; (c) AC impedance spectra after 100 cycles at 60 C; (d) amount of Mn 2+ ions captured by separators (estimated from ICP-MS analysis); (e)13 C-NMR spectra verifying the chelation of Mn 2+ ions by ether/hydroxyl groups of agarose; (f) discharge rate performance for the high mass loading LMO cathode (¼18 mg cm À2 ).…”

Temperature-dependent oxygen behavior of LixNi0.5Mn1.5O4 cathode material for lithium battery

“…[7][8][9] The 4 V LiMn 2 O 4 -modified composition LiNi x Mn 2-x O 4 materials have raised interest due to the high operating voltage of ∼4.7 eV for a dense energy cathode material. [10][11][12][13][14] Among different Ni/Mn contents in LiNi x Mn 2-x O 4 , various studies such as synthetic method, [15][16][17][18] thermal stability, [19][20][21][22] effects of ordered and disordered local structures, 23 cation ordering, 24 particle size, 25,26 and composition change [27][28][29] have been reported on LiNi 0.5 Mn 1.5 O 4 .…”