Synthesis of LiCoMnO4 via a sol–gel method and its application in high power LiCoMnO4/Li4Ti5O12 lithium-ion batteries

Preparation of LiCoMnO₄ Assisted by Hydrothermal Approach and its Electrochemical Performance

“…7). The discharge capacity of the sample obtained at 750°C is comparable to those reported in the literature on LiCoMnO 4 synthesized by a solid-state reaction (Kawai et al, 1998) or sol-gel method (Huang et al, 2012). Kawai et al (1998) Beyond this concentration, e.g., at 1.5 M LiOH, rocksalt phase of Li 2 MnO 3 was developed.…”

“…As a result, spinel LiMn 2 O 4 phase could be synthesized when the LiOH concentrations were employed in the range of 1.2-1.35 M in our experimental conditions. It is also notable that the peaks of the as-prepared LiMn 2 O 4 shifted significantly toward high 2θ angle, which is due to the doping of cobalt ions in the structure of LiMn 2 O 4 (Huang et al, 2012).…”

“…Compared to another 5 V spinel, LiNi 0.5 Mn 1.5 O 4 which has been investigated extensively (Li et al, 2007;Santhanam and Rambabu, 2010;Yang et al, 2011;Zhong et al, 2011;Cabana et al, 2012;Mao et al, 2012;Liu et al, 2012), LiCoMnO 4 is relatively new material. LiNi 0.5 Mn 1.5 O 4 is usually charged to cutoff voltages of 4.9-5.0 V Shin et al, 2012;Yi and Hu, 2007;Huang et al, 2011) while LiCoMnO 4 has to be charged to 5.3 V due to its two charging plateaus at 5.2 and 4.9 V (Kawai et al, 1999;1998;Huang et al, 2012;Hu et al, 2013;Kuwata et al, 2014). The main obstacle to practice LiCoMnO 4 is the requirement of electrolytes tolerant to high voltage above 5.0 V. Recent development of electrolytes such as reducing the contents of impurities and exploring new electrolytes (Markevich et al, 2006;Abouimrane et al, 2009) and additives (Lee et al, 2007;Xu et al, 2012;Abouimrane et al, 2013), offers a new chance for the practical application of LiCoMnO 4 as cathode materials for lithium-ion batteries.…”

“…For example, a LiCoMnO 4 was obtained by heating the stoichiometric mixtures of dried Li 2 CO 3 , CoO and MnCO 3 (Kawai et al, 1998). Our group recently has prepared LiCoMnO 4 via a sol-gel method (Huang et al, 2012). However, the synthesis of LiCoMnO 4 by a hydrothermal method has not reported, to the best of our knowledge.…”

Application of quaternized activated carbon derived from Macadamia nutshells for the removal of hexavalent chromium from aqueous solutions

“…The dried precursor was calcined at 750°C for about 15 hours in an air atmosphere producing the final Li-metal oxide spinel cathode material. 27 Modifications of the spinel material were done by doping the spinel material with various transition elements (only a few are mentioned such as Mg, Al, Cr, Co and Ni) 27,[30][31][32] and by surface coating (such as nano-SiO 2 , Al 2 O 3 and carbon coating). 33 These modifications helped to increase the electrochemical properties of the material, such as improvement in capacity retention and cycleability, improved interfacial properties between electrolyte and electrode, enhanced electrical conductivity and protecting the metal oxide from chemical corrosion.…”