Biomass derived hierarchically porous carbon inherent structure as an effective metal free cathode for Li‐O₂/air battery

Abstract

A hierarchical porous carbon framework derived from betel-nut is synthesized and employed as a bifunctional cathode in a Li-O 2 /air battery. The prepared betel nut derived activated porous carbon (BNAPC) material exhibits an ordered and merged tube-like porous morphology and a high specific surface area of 768 m 2 /g. The presence of both meso and micro porous leads to a well-developed 3D interconnected carbon framework, which provides an efficient path for the diffusion of the reactant (oxygen as well as air) and also allows stocking the discharge product of Li 2 O 2 . Therefore, it exhibits a high specific capacity and excellent rate performance. A maximum discharge capacity of 9560 and 2000 mAh/g at a current density of 100 mA/g for oxygen and ambient air respectively as the reactant is achieved. The prepared material also exhibits reversible cyclic stability of 27 cycles with a specific capacity of 1000 mAh/g at a 100 mA/g current density in oxygen atmosphere.

Surface Phosphatization for a Sawdust‐Derived Carbon Catalyst as Kinetics Promoter and Corrosion Preventer in Lithium–Oxygen Batteries

“…It has been demonstrated that the side products and corrosion during the ORR/OER process are the main reasons for the degradation of carbon-based catalysts in LOBs. [17,52,55] It can be concluded that the surface phosphatization can efficiently prevent the corrosion and the formation of side products of carbon-based catalysts in LOBs. This can be attributed to the catalytic capability of the P-doped active sites discussed in the following theoretical section.…”

Modification Strategies of High-Energy Li-Rich Mn-Based Cathodes for Li-Ion Batteries: A Review

“…The twin problems of the energy crisis and environmental pollution have been the most serious challenges for the development of the global community in recent years. The main focus of research and development is on seeking a combination of theoretical research and experimentation to address these two major challenges, thereby realizing a new generation of more environmentally friendly energy technologies [ 1 , 2 , 3 , 4 ]. One focus is on the conversion and storage of clean energy, while lithium-ion battery (LIB) systems are one of the most anticipated energy storage devices [ 5 , 6 , 7 ].…”

Yeast-Derived Sulfur Host for the Application of Sustainable Li–S Battery Cathode

“…To solve these problems, substantial efforts were devoted to design appropriate host materials and structures with both high electrical conductivity and excellent mechanical flexibility, such as conductive polymers [14,15], graphene [16,17], carbon nanotubes [18], and some metal oxides and sulfides [19][20][21]. Recently, as a viable and effective alternative, biomass-derived carbon materials were widely developed for both Li-S batteries and other metal-ion batteries because of their sustainability, easy availability, low-cost, and environmental friendliness [22][23][24][25]. For example, Guo et al prepared porous Fe 7 S 8 nanowires on a SiO x /nitrogen carbon matrix by hydrothermal reaction and the calcination of bamboo leaves.…”