Enhanced rate capability of LiMn0.9Mg0.1PO4 nanoplates by reduced graphene oxide/carbon double coating for Li-ion batteries

Graphene‐Containing Nanomaterials for Lithium‐Ion Batteries

“…Zong et al [ 375 ] reported a LiMnPO 4 -C/GNPs composite that displayed reversible capacities of 139 mAh g −1 at 0.05 C and 119 mAh g −1 at 1 C. A carbon-coated LiMnPO 4 nanoplate/ graphene material displayed a specifi c capacity of 159 mAh g −1 at C/20 and a retention of 72.3% of its initial capacity after 100 cycles. [ 376 ] In another work, a LiMnPO 4 -C/GNPs composite cathode material delivered a capacity of 105.1 mAh g −1 at 0.05 C over a voltage range of 2.5-4.4 V. [ 377 ] Graphene oxideassisted facile hydrothermal synthesis of LiMn 0.6 Fe 0.4 PO 4 nanoparticles [ 378 ] and rGO/carbon double-coated LiMn 0.9 Mg 0.1 PO 4 nanoplates [ 379 ] are also discussed as cathode material for LIBs.…”

Reduced graphene oxide/carbon double-coated 3-D porous ZnO aggregates as high-performance Li-ion anode materials

“…A modified Hummers' method was used to synthesize graphene oxide (GO), as described elsewhere [47,48]. Prior to GO wrapping, the surface modification of ZnO (or C/ZnO) was first performed by mixing aminopropyltriethoxysilane (C 9 H 23 NO 3 Si: APTES) with ZnO in ethanol dispersion for 12 h. An aqueous graphene-oxide suspension (100 ml, 2 mg/ml) was added into the APTES-modified ZnO dispersion (500 ml, 1 mg/ml) under stirring for 20 min, followed by centrifugation [43,[49][50][51][52]. Thermal reduction of GO was carried out under H 2 /Ar 4 vol.% H 2 at 550°C for 3 h.…”

“…Such a carbon coating entails the use of disordered carbon while the electronic conductivity is not significant until the carbonization temperature is higher than the temperature when carbothermal reductions of metal oxides start to occur (approximately 600°C) [35,36]. Alternatively, the flexible graphene, a sp 2 -hybridized two-dimensional carbon layer is one of the best effective ways to enhance the anode performance of ZnO by providing high electronic conductivity and/or circumventing mechanical stresses during the electrochemical cycling [35][36][37][38][39][40][41][42][43][44].…”

Preparation, electrochemical characterization and in-situ kinetic observation of Na2Li2Ti6O14 as anode material for lithium ion batteries

“…Owing to the found lithium ion diffusion channels, the design and preparation of lithium storage materials can take the right routes with low cost. For instance, nanosheets or nanoplates become the prior morphology for LiMnPO 4 due to its one-dimensional lithium ion diffusion pathway [5,6]. Besides, the chemical diffusion coefficient in the solids is also an important parameter to design high power electrode materials.…”