Thermally fabricated cobalt telluride in nitrogen-rich carbon dodecahedra as high-rate potassium and sodium ion battery anodes

Abstract

Cobalt telluride anchored in nitrogen-rich carbon dodecahedra (CoTe@NCD) were synthesized by simultaneous pyrolysis-tellurium melt impregnation of ZIF-67 MOFs. The purely thermal method involved no secondary chemicals and no waste byproducts....

Understanding supercapacitive performance of a N-doped vanadium carbide/carbon composite as an anode material in an all pseudocapacitive asymmetric cell

“…2f, results in three peaks centered around 397.3 eV, 399.2 eV, and 400.9 eV, indicating the presence of pyridinic-N (N-6), pyrrolic-N (N-5), and quaternary-N (N-Q) species, respectively. 27,28 Therefore, the above structural and morphological analyses indicate the formation of a porous structure of a N-doped V 4 C 3 /C nanohybrid which is characterized further for electrochemical energy storage applications.…”

Metal–Organic Framework‐Based Materials for Advanced Sodium Storage: Development and Anticipation

“…Attributed to unique 2D architecture with large space and the incorporation of N‐doped carbon, the NiTe 2 /nitrogen‐doped graphitic carbon nanosheets (abbreviated as NiTe 2 @NCNs) derived from Ni/HMT MOF (HMT = hexamine) presented fast sodium storage kinetics, especially at elevated current densities (267.7 and 189.0 mAh g −1 at 10 and 20 A g −1 , respectively). [ 34 ] Inspired by the exceptional anode performances of metal tellurides, other MOF‐derived carbon composites such as Bi 2 Te 3 @C composite derived from Bi‐BTC [ 366 ] and CoTe nanoparticles in N‐rich carbon dodecahedra (CoTe@NCD) derived from ZIF‐67 [ 367 ] were studied. Bestowed by the homogenous formation of nanoparticles and the well retained carbon frameworks, these composites delivered minimal volume variations and better conductivity, thereby resulting in satisfying sodium storage properties.…”

Recent technological advances in designing electrodes and electrolytes for efficient zinc ion hybrid supercapacitors

“…In order to address the aforementioned issues, other systems based on monovalent or multivalent cations, such as sodium (Na + ), potassium (K + ), magnesium (Mg 2+ ), zinc (Zn 2+ ), calcium (Ca 2+ ), and aluminum (Al 3+ ) have been explored rationally. [14][15][16] However, they are also not without their shortcomings! Several intrinsic flaws, including safety hazards caused by the reactive metallic Na/K and the inflammable nature of organic electrolytes, have somewhat restricted their widespread usage in the ESS and electronics industry.…”

“…Several intrinsic flaws, including safety hazards caused by the reactive metallic Na/K and the inflammable nature of organic electrolytes, have somewhat restricted their widespread usage in the ESS and electronics industry. 15,16 Meanwhile, multivalent cations, including Ca 2+ , Mg 2+ , Zn 2+ , and Al 3+ , have demonstrated some advantageous traits like fast charge transfer dynamics as compared to the monovalent cations. [17][18][19] Benefitting from the suitable redox potential of À0.76 V vs. standard hydrogen electrode (SHE) and a satisfying theoretical capacity of 820 mA h g À1 (equivalent to 5855 mA h cm À3 ) of the Zn electrode, Zn ion-based HSC devices have garnered a lot of attention as potential alternative ESSs after carefully examining their dynamics, performance, and security.…”