Strengthening ion uptake and mitigating volume change via bimetallic telluride heterojunction for ultrastable K-ion hybrid capacitors

Comprehensive Insights into Potassium‐Ion Capacitors: Mechanisms, Materials, Devices and Future Perspectives

“…H-FeS 2 @3DCS//NSPC [142] 0-4.0 118 10 000 87% after 18 000 cycles; 2 A g −1 CoSe 2 @Ti 3 C 2 T n //AC [153] 0.01-3 199.0 ≈1160 84.8% after 6000 cycles; 0.2 A g −1 Co 2 P/MoSe 2 @NC//AC [286] 0-4.0 107.2 22 263.7 74.5% after 3000 cycles; 1 A g −1 MoS 2 @MCNWs-2 //AC [287] 0.5-4.0 106.5 9703.9 97.6% after 6000 cycles; 1 A g −1 H-MoS 2 @CNFs//ACFMs [ 288] 0.01-3.9 165 8348 81.8% after 10 000 cycles; 4 A g −1 MCO@MCS@rGO//AC [140] 1.0-4.0 85.3 9000 76.6% after 5000 cycles; 2 A g −1 MCT-NC@rGO//PAC [154] 0-4.0 111.3 8413.3 95% after 6000 cycles; 1 A g −1 FeS 2 /rGO-NPC//AC [289] 0.5-4.0 134 17 973 91% after 15 000 cycles; 2 A g −1 c-SnNC-HNA 0.75/800 //AC [ 215] 0.1-3.5 112.5 7369.0 97.6% after 10 000 cycles; 0.5 A g −1 MoSe 2 ⊂CNB//AC [ 290] 0.01-4.0 130.7 13 607 97.6% after 10 000 cycles; 0.5 A g −1 WS 2 @NCNs//NCHS [ 141] 0.5-4.2 103.4 4700 78% after 500 cycles; 0.5 A g −1 N-MoSe 2 /G//AC [24] 0.5-4.0 119 7212 75.2% after 3000 cycles; 1 A g −1 MoSe 2 -AC [ 291] 1.0-4.0 169 588 81.58% after 1000 cycles; 1 A g −1 ED-MoS 2 @CT//PC [143] 0-4.0 148 21 000 70.2% after 10 000 cycles; 5 A g −1 rGO-NiMoO 4 @Ni-Co-S//rGO-MDC [ 118] 0-1.8 801.8 7980 90.89% after 10 000 cycles; 5 A g −1 Mo 2 C/NCNFs//AC [ 126] 0.01-3.8 88.2 629.9 80.4% after 1000 cycles; 0.5 A g −1 NCOP//BCN [70] 0.01-4.5 166.5 22 500 86.5% after 10 000 cycles; 5 A g −1 𝛼-NiS-NSCN//CHCF [ 137] 0-4 187 8400 85.6% after 3500 cycles; 2 A g −1 AC//PB [83] 0-1.9 28 1890 98% after 1200 cycles; 2 A g −1 CAC//KMCO [ 84] 0-3.0 43 30 000 88% after 30 000 cycles; 10 A g −1 K 2 TP//PANI [ 81] 1.0-4.0 153 6795 80% after 10 000 cycles; 2 A g −1 MoS 2 //KMF-2 [ 292] 0-1.8 62 -91.3% after 10 000 cycles; 1 A g −1 AC//PB [293] 0-3 48 1247 87% after 2000 cycles; 0.25 A g −1 BPNS//AC [87] 0-4.3 93 9380 99.5% after 6500 cycles; 1 A g −1 HA//AC [ 88] 0.01-3. PICs configurations combining battery-type anodes with pseudocapacitive cathodes.…”

“…Metal Ditellurides: MoTe 2 : In 2023, Sun et al published a study on the development of an advanced anode candidate for long-lasting K-ion storage. [154] They successfully created a composite electrode by wrapping a bimetallic Mo-Co telluride heterojunction with reduced graphene oxide (rGO), which they referred to as MoTe 2 @CoTe 2 -nitrogen-doped carbon@rGO (MCT-NC@rGO) in Figure 41. To further explore its potential applications, researchers constructed a PIC using MCT-NC@rGO as the anode material alongside an AC cathode.…”

“…Reproduced with permission. [154] Copyright 2023, Elsevier B.V. achieved impressive energy and power output values of 112.8 Wh kg − 1 and 8413 W kg −1 , respectively while maintaining longevity over extended periods with more than 6000 cycles at 1.0 A g −1 .…”

“…g) STEM image along with corresponding EDS mapping of MCT-NC@rGO. Reproduced with permission [154]. Copyright 2023, Elsevier B.V.…”

Electronically modulated bimetallic telluride nanodendrites atop 2D nanosheets using a vanadium dopant enabling a bifunctional electrocatalyst for overall water splitting

“…Guo et al (2021) synthesized a molybdenum nitride/cobalt nitride heterojunction with a modulated electronic environment at the heterointerface for effective water splitting 29 Zeng et al (2023) reported the heterojunction of the Mo–Co telluride moiety but they applied it to an ultrastable K-ion hybrid capacitor. 30 To the best of our knowledge, no reports have focused on the electronic modification of CoTe 2 /MoTe 2 heterojunctions for the HER, OER & overall water splitting. Nevertheless, while exploiting bimetallic tellurides, there is still much room for markedly enhancing the catalytic activity of the HER and OER by employing different approaches, such as defect engineering, morphology tuning, interface engineering, and doping engineering.…”