[PDF] Top 20 Synthesis of Double-Shelled LiMn2O4 Hollow Microspheres with Enhanced Electrochemical Performance for Lithium Ion Batteries

... decade, hollow micro-/nanomaterials have attracted considerable attention in the field of LIBs due to their structural ...the hollow interiors can well accommodate the volume change and alleviate the strain ... See full document

... 250Xi spectrometer using Al Kα (1486.6eV) X-ray source. The EIS and CV of the cathode materials were texted using electrochemical workstations (CHI860D) by Beijing Huakeputian Technology. The coin cell was ... See full document

... 0.5e − ) [29]. The electrode exhibits a discharge capacity of 125.9 mAh/g and charge capacity of 132.8 mAh/g at 0.1 C for the first cycle. The well overlapping of charge- discharge curves and the mild capacity fading ... See full document

... the hollow structures of HGOSs and ...and hollow microstructure, distinct from the lam- inar structure of bulk graphite oxide and paper-like texture of graphene ...of microspheres, which is assigned ... See full document

... the ion/electron transport distance for rapid charge transfer ...the hollow space within the microspheres facilitates adequate electrolyte penetration and enlarges the effective contact area of the ... See full document

... high-rate performance. The design and synthesis of nanometer-sized materials have been verified to be an excellent solution because of their large surface area that can enhance the contact between active ... See full document

... In this paper, a conductive polymer-coated Ge anode material was prepared by a simple and feasible solution impregnation method for the first time. SEM, TEM, XRD and FT-IR measurements showed that nanosized Ge particles ... See full document

... (ICP-OES), ion chromatograph, energy-dispersive X-ray (EDX) analyses, and so ...the electrochemical performance of titanium oxyhydroxy-fluoride for both lithium-ion batteries ... See full document

... the first discharge process the cell voltage initially drops rapidly until it reaches about 0.8 V where there is a plateau for a considerable amount of time. The plateau has been reported for the influence of amorphous ... See full document

... just above 0 V results from the formation of SEI layers, and the interfacial metallic lithium storage [14, 28, 29]. During the initial charge from 0 to 3 V, the peak at ~1.95 V corresponds to the oxidation of ... See full document

... 1:1 (v/v) mixture of ethylene carbonate and diethyl carbonate. The cell was assembled in an argon- filled glove box and tested using charge-discharge system in the voltage range of 3.0-4.3 V vs. Li + /Li at different ... See full document

... the hollow microspheres is not due to an irreversible structural change, but to diffusion-limited end-of-life polarization resulting from limited electronic conductivity and slow Li-ion diffusion, ... See full document

... 0.5mV/s. Electrochemical impedance spectroscopy (EIS) of the products was carried out by an electrochemical workstation(CHI 660) with an amplitude of ac voltage 5mV and a frequency range from 100 kHz to ... See full document

... solid-state synthesis, for example adipic acid or cellulose, which forms a carbon coating on the particles during their synthesis without the need for further ... See full document

... and dimethyl carbonate (1:1). Cyclic voltammetry (CV) tests were carried out on an electrochemistry workstation (CHI660D, CH Instrument, Inc., Austin, TX, USA) at a scan rate of 0.1 mV s −1 vs. Li/Li + reference ... See full document

... were prepared to study the effects of Fe and/or Al doping on the structure and performance, and the corresponding samples was named as LMP, LMFP, LAMP and LAMFP, respectively. XRD was used to investigate the ... See full document

... The working electrodes were prepared by milled the mixture of 80 wt % active materials with 10 wt % super P and 10 wt % polyvinylidene fluoride (PVDF) dissolved in N-methyl-2-pyrrolidone (NMP). Then this uniform slurry ... See full document

... As shown in Fig. 5 (a), there are two main electrochemically active regions observed: at ~4.0 V and at ~4.7 V, which was corresponding to the Mn 4+ /Mn 3+ and the Ni 4+ /Ni 2+ redox couples, respectively [21-23]. The Ni ... See full document

... acid and glycol which their molar ratio was kept as 1:4 dissolved in 20 mL of distilled water. The molar ratio of metal ion to citric acid was 1:1. Then the solution was stirred at 80 °C for 2 h, and the obtained ... See full document

... MgFe2O4 hollow structural microspheres were fabricated through an environmental friendly hydrothermal carborn templating approach with subsequently annealing process in air, where carbon spheres plays as ... See full document