Graphene Oxide‐Supported β‐Tin Telluride Composite for Sodium‐ and Lithium‐Ion Battery Anodes

Abstract

High‐charge‐capacity sodium‐ and lithium‐ion battery anodes based on tin telluride are reported for the first time. Graphene oxide/cubic β‐SnTe electrodes exhibit exceptionally high reversible volumetric charge capacities above 3000 and 1300 mAh cm−3 at 100 mA g−1 charging rate for lithium and sodium ion batteries, respectively, and they show very good rate capabilities retaining 68 and 60 % of the respective capacities even at 2000 mA g−1 charging rate. The reversible charge capacity for lithiation is approximately equal to the theoretical value of the active material. The superior electrode performance is attributed to the high conductivity of tellurium, the mechanical buffering of volume changes by the large row‐V host elements, the elasticity of the reduced graphene oxide support, and the very low specific equivalent volumes involved in sodiation and lithiation of SnTe.

Thermochemical Energy Storage using LiNO3‐Doped Mg(OH)2: A Dehydration Study

“…The global efforts to harness renewable energy and energy‐saving technologies for abatement the CO 2 emissions urge researchers to look for new materials for the storage of energy and there are vast international efforts towards this goal . Energy storage is usually associated with storage of electricity in supercapacitors and electric batteries because electricity is the most convenient form of energy for further utilization. However, about 90 % of primary energy is consumed or dissipated as thermal energy, which has a huge underexploited potential for storage and re‐utilization .…”

Recent Advances in Aerosol‐Assisted Spray Processes for the Design and Fabrication of Nanostructured Metal Chalcogenides for Sodium‐Ion Batteries

“…Tellurium (Te) is a chalcogen that exhibits electrical conductivity (200 S m −1 ) several orders of magnitude higher than Se (10 −4 S m −1 ) and high volumetric capacity on account of its high density . Similar to sulfides and selenides, tellurides react with Na to produce a Na 2 Te matrix as a discharge product .…”

“…An Sb 2 Te 3 ‐C composite was also synthesized by a two‐step ball‐milling process, and exhibited a high tap density of 2.05 g cm −3 and a reversible capacity of 373 mA h g −1 after 50 cycles at a current density of 50 mA g −1 . The liquid‐phase synthesis of other metal telluride/carbon materials, such as CoTe 2 /graphene, Cu 1.75 Te/C, and SnTe‐rGO, has also been introduced . However, the ball‐milling process is not applicable to the synthesis of nanostructured metal telluride materials.…”

“…Te llurium( Te)i sachalcogen that exhibits electricalc onductivity (200 Sm À1 )s everalo rders of magnitude higher than Se (10 À4 Sm À1 )a nd high volumetric capacity on account of its high density. [92][93][94] Similart os ulfidesa nd selenides,t ellurides react with Na to produce aN a 2 Te matrix as ad ischarge product. [95] Therefore, metal tellurides could be another promising anode material forS IBs, but to date they have not been as widely investigated as sulfides and selenides.…”

“…[97] The liquid-phases ynthesis of other metal telluride/carbon materials, such as CoTe 2 /graphene, Cu 1.75 Te /C, and SnTe-rGO, has also been introduced. [94,98,99] However,t he ball-milling processi sn ot applicable to the synthesis of nanostructured metal telluride materials.T hus, spray Reproduced with permission. [86] Copyright 2016,Royal Society of Chemistry.g )SEM, h, i) TEM,and j) elemental mapping images of the mesoporous WSe 2 -rGO hybrid.…”