Binder Free Hierarchical Mesoporous Carbon Foam for High Performance Lithium Ion Battery

Abstract

A hierarchical mesoporous carbon foam (ECF) with an interconnected micro-/mesoporous architecture was prepared and used as a binder-free, low-cost, high-performance anode for lithium ion batteries. Due to its high specific surface area (980.6 m2/g), high porosity (99.6%), light weight (5 mg/cm3) and narrow pore size distribution (~2 to 5 nm), the ECF anode exhibited a high reversible specific capacity of 455 mAh/g. Experimental results also demonstrated that the anode thickness significantly influence the specific capacity of the battery. Meanwhile, the ECF anode retained a high rate performance and an excellent cycling performance approaching 100% of its initial capacity over 300 cycles at 0.1 A/g. In addition, no binders, carbon additives or current collectors are added to the ECF based cells that will increase the total weight of devices. The high electrochemical performance was mainly attributed to the combined favorable hierarchical structures which can facilitate the Li+ accessibility and also enable the fast diffusion of electron into the electrode during the charge and discharge process. The synthesis process used to make this elastic carbon foam is readily scalable to industrial applications in energy storage devices such as li-ion battery and supercapacitor.

Utilizing the Space‐Charge Region of the FeNi‐LDH/CoP p‐n Junction to Promote Performance in Oxygen Evolution Electrocatalysis

“…Tr emendous efforts have been devoted to developing the new substitutions based on more appealing first-row 3d transition metal compounds as cost-efficient OER electrocatalysts including their oxides [14,15] /hydroxides, [16] metal sulfides, [17] nitrides, [18] phosphides, [19] and phosphates. [21,22] However,t hese methods cannot essentially tailor the intrinsic catalytic performances of active sites.T herefore,h ow to enhance the activities of active sites itself is still as ignificant subject in catalytic reactions.R ecently,o xygen [23] and Co [24] vacancies were proved to feature in substantially enhancing catalytic activities for OER by the improved electronic structure,electronic transfer capability,a nd charge density.O rganic groups with different electrophilic/nucleophilic properties were applied to adjust the electron density of the inherent catalytic sites. [21,22] However,t hese methods cannot essentially tailor the intrinsic catalytic performances of active sites.T herefore,h ow to enhance the activities of active sites itself is still as ignificant subject in catalytic reactions.R ecently,o xygen [23] and Co [24] vacancies were proved to feature in substantially enhancing catalytic activities for OER by the improved electronic structure,electronic transfer capability,a nd charge density.O rganic groups with different electrophilic/nucleophilic properties were applied to adjust the electron density of the inherent catalytic sites.…”

Domestic Food Waste Derived Porous Carbon for Energy Storage Applications

“…Further, in porous carbon, Li + and Na + ions can be either reversibly inserted into the micro or mesopores or adsorbed on the surface of carbon, thereby demonstrate stable reversible capacity. In particular, bio‐carbons are bestowed with better permeability, larger active surface area for the interfacial adsorption of ions corresponding to different pore sizes and shorter diffusion paths to facilitate faster diffusion of ions to ensure better electrode properties . As a result, research on natural bio waste assumes importance.…”

Eggshell-Membrane-Derived Carbon Coated on Li2FeSiO4 Cathode Material for Li-Ion Batteries

“…The additional inserted picture in the same figure reveals the information on immobile ions in the electrode at fresh cell (green color electrode) and the cell at 50 th cycle (red color electrode). The capacity of the materials is reduced, which can be clearly identified from the height of the semicircle for the 50 th cycle, which is very low as compared to the fresh cell [47]. Figure 8a, shows the XRD studies of LFS@ ESM after the cell cycled up to 100 cycles.…”