Sodium‐Ion Hybrid Battery Combining an Anion‐Intercalation Cathode with an Adsorption‐Type Anode for Enhanced Rate and Cycling Performance

Abstract

Sodium‐ion batteries (SIBs) are based on natural abundant and low‐cost materials and show a good chemical safety. They have thus become an alternative battery technology to conventional lithium‐ion batteries. However, SIBs usually suffer from poor rate capability and insufficient cycling performance caused by the sluggish reaction kinetics of the large Na+ ions, restricting their practical application. Herein, we report a novel sodium‐ion hybrid battery (SHB) combining an anion intercalation‐type graphite cathode material with an adsorption‐type hierarchical porous carbon anode material. The hierarchical porous amorphous carbon is derived from a natural biomass template with macro‐, meso‐, and micro‐ pores as well as high specific surface area, which are beneficial for fast adsorption/desorption of Na+ ions. Consequently, attributed from the hybrid battery design, this SHB exhibits excellent rate capability and cycling performance with a reversible capacity of 80 mAh g−1 at 2 C over a voltage window of 0–3.8 V and capacity retention of 87 % after 1000 cycles at 10 C.

Toward Rapid‐Charging Sodium‐Ion Batteries using Hybrid‐Phase Molybdenum Sulfide Selenide‐Based Anodes

“…[ 1 ] However, the low energy density and power density of SIB anodes currently limit the practical application of SIBs in electronics. [ 2,3 ] Metal sulfides/selenides/phosphides and intermetallic compounds have been developed to improve the performance of SIB anodes. [ 4–6 ] In conversion reactions, 2D metal sulfides/selenides exhibit high energy densities and low diffusion energy barriers.…”

Polyolefin‐Based Janus Separator for Rechargeable Sodium Batteries

“…[2] Consequently,r echargeable sodium (Na) batteries have been developed as al ow-cost and more environmentally friendly alternative to LIBs due to the natural abundance of Na. [3] When coupling Na metal with sulfur or oxygen cathodes,t he room-temperature Na-S and Na-O 2 batteries based on conversion chemistry can deliver much higher energy densities than LIBs,w hich is attractive for grid-scale energy storage. [4] Separators are core components for Na batteries.T he separator structure,t ogether with the interaction between pore-space surface and liquid electrolytes (LEs), significantly affects the ion transport and battery polarization.…”

Dandelion‐like CoO/Co3O4/Carbon Composites as Anode Materials for a High‐Performance Lithium Ion Battery

“…Biomass-derived carbons used in lithium-ion batteries (LIBs) or sodium-ion batteries are attracting more and more attentions. [1][2][3][4] Compared with other carbon sources, biomaterials are abundant, renewable, naturally degradable, cheap and easy to obtain. And for LIBs, the most important thing is to develop green and cheap negative electrode materials with high-capacity for meeting the growing demands.…”