Rational design of metal organic framework-derived FeS₂ hollow nanocages@reduced graphene oxide for K-ion storage

Abstract

We are the first to utilize reduced graphene oxide (RGO) wrapped metal organic framework-derived FeS2 hollow nanocages (FeS2@RGO) as an anode for K-ion batteries.

K‐Ion Storage Enhancement in Sb2O3/Reduced Graphene Oxide Using Ether‐Based Electrolyte

“…All the electrodes use DME-KFSI as electrolyte at 100 mAh g −1 for measurement. [24,25,[44][45][46][47][48][49][50][51] It is found that our Sb 2 O 3 -RGO composite shows a better K-ion storage performance than other metallic oxide-based materials for KIBs. Compared with Sb 2 O 3 electrode, RGO electrode exhibits the initial reversible specific capacity of 207 mAh g −1 and maintains a reversible specific capacity of 208 mAh g −1 after 50 cycles, owning to its excellent stability and conductivity.…”

A Robust Solid Electrolyte Interphase Layer Augments the Ion Storage Capacity of Bimetallic‐Sulfide‐Containing Potassium‐Ion Batteries

“…[43] Impressively fast potassium-ion storage performance is evident in our system when compared to the rate performance of previously reported advanced anode materials (Figure 6d). [15,[18][19][20]27,39,[44][45][46][47][48][49] To further verify the cycle life of our electrode,t he long-term cycling performance of NCS@RGO-2 using KFSI-EP electrolyte at 200 mA g À1 was ascertained (Figure 6e). Our NCS@RGO-2 electrode exhibits an excellent cycle stability of 495 mAh g À1 at 200 mA g À1 after 1900 cycles (cycling for 314 days).…”

“…[14,15] However,c arbonaceous materials exhibit ar elatively low reversible capacity because potassium-ion storage is limited by the insertion mechanism. [18] Liu et al constructed thinly layered antimony sulfide/carbon sheet composites by solution-triggered one-step shear exfoliation, to produce an electrode with ah igh potassium-ion storage capacity (404 mAh g À1 at 500 mA g À1 after 200 cycles). [18] Liu et al constructed thinly layered antimony sulfide/carbon sheet composites by solution-triggered one-step shear exfoliation, to produce an electrode with ah igh potassium-ion storage capacity (404 mAh g À1 at 500 mA g À1 after 200 cycles).…”

“…[16,17] Therefore,further development of suitable anodes with high potassium-ion storage performance is an important issue.A mong the anode materials reported, transition-metal sulfides have drawn attention because of their appreciable electrochemical performance in KIBs. [18] Liu et al constructed thinly layered antimony sulfide/carbon sheet composites by solution-triggered one-step shear exfoliation, to produce an electrode with ah igh potassium-ion storage capacity (404 mAh g À1 at 500 mA g À1 after 200 cycles). [19] Xie et al prepared MoS 2 /reduced graphene oxide (RGO) composites by as olvothermal route,which delivered ah igh initial reversible specific capacity of 353 mAh g À1 at 100 mA g À1 .…”

Direct Growth of MoO2/Reduced Graphene Oxide Hollow Sphere Composites as Advanced Anode Materials for Potassium‐Ion Batteries

“…[7,8] The physical andc hemical properties of potassium and lithium are also very similar.A dditionally,t he standard electrochemical potential of K( À2.93 V) is very close to that of Li (À3.04 V) with respect to the standard hydrogen electrode (SHE). [10][11][12][13][14][15][16][17][18][19][20] Amongt hem, only af ew transition metal oxides, such as Co 3 O 4 -Fe 2 O 3 , [18] a-MoO 3 , [21] SnO 2 , [22,23] and V 2 O 3 [24] have been investigated in KIBs. [10][11][12][13][14][15][16][17][18][19][20] Amongt hem, only af ew transition metal oxides, such as Co 3 O 4 -Fe 2 O 3 , [18] a-MoO 3 , [21] SnO 2 , [22,23] and V 2 O 3 [24] have been investigated in KIBs.…”