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Clever and rational design of structural hierarchy, along with precise component adjustment, holds profound significance for the construction of high‐performance supercapacitor electrode materials. In this study, a binder‐free self‐supported CCO@N0.5C0.5OH/NF cathode material is constructed with hierarchical hetero‐core–shell honeycomb nanostructure by first growing CuCo2O4 (CCO) nanopin arrays uniformly...
Reversible three‐electron redox of Cr3+/Cr6+ in layered cathode materials for rechargeable batteries is very attractive in layered cathode materials, which leads to high capacity and energy density for rechargeable batteries. However, the poor reversibility and Cr‐ion migration make it very challenging. In this work, by introducing V ions into tetrahedral sites of layer‐structured NaCrO2, reversible...
Lithium‐rich layered oxides (LLOs) are concerned as promising cathode materials for next‐generation lithium‐ion batteries due to their high reversible capacities (larger than 250 mA h g−1). However, LLOs suffer from critical drawbacks, such as irreversible oxygen release, structural degradation, and poor reaction kinetics, which hinder their commercialization. Herein, the local electronic structure...
Na4MnV(PO4)3/C (NMVP) has been considered an attractive cathode for sodium‐ion batteries with higher working voltage and lower cost than Na3V2(PO4)3/C. However, the poor intrinsic electronic conductivity and Jahn–Teller distortion caused by Mn3+ inhibit its practical application. In this work, the remarkable effects of Zr‐substitution on prompting electronic and Na‐ion conductivity and also structural...
Aqueous rechargeable zinc‐ion batteries (ZIBs) have attracted burgeoning interests owing to the prospect in large‐scale and safe energy storage application. Although manganese oxides are one of the typical cathodes of ZIBs, their practical usage is still hindered by poor service life and rate performance. Here, a MnO2–carbon hybrid framework is reported, which is obtained in a reaction between the...
Sodium‐ion batteries (SIBs) have attracted wide interest for energy storage because of the sufficient sodium element reserve on the earth; however, the electrochemical performance of SIBs cannot achieve the requirements so far, especially, the limitation of cathode materials. Here, a kilogram‐scale route to synthesize Na2FePO4F/carbon/multi‐walled carbon nanotubes microspheres (NFPF@C@MCNTs) composite...
The high cost and scarcity of lithium resources have prompted researchers to seek alternatives to lithium‐ion batteries. Among emerging “Beyond Lithium” batteries, rechargeable aluminum‐ion batteries (AIBs) are yet another attractive electrochemical storage device due to their high specific capacity and the abundance of aluminum. Although the current electrochemical performance of nonaqueous AIBs...
Ca‐ion batteries (CIBs) have been considered a promising candidate for the next‐generation energy storage technology owing to the abundant calcium element and the low reduction potential of Ca2+/Ca. However, the large size and divalent nature of Ca2+ induce significant volume change and sluggish ion mobility in intercalation cathodes, leading to poor reversibly and low energy/power densities for CIBs...
Metal−organic frameworks (MOFs) and their derivatives have attracted enormous attention in the field of energy storage, due to their high specific surface area, tunable structure, highly ordered pores, and uniform metal sites. Compared with the wide research of MOFs and their related materials on anode materials for alkali metal ion batteries, few works are on cathode materials. In this review, design...
In article number 2004925, Yan Yu, Yanglong Hou, and co‐workers report a hierarchical porous Na3V2(PO4)2O2F hollow nanosphere material with fast ionic/electronic conductivities, easy and continuous electrolyte supplement and robust electrode integrity properties, kinetically accelerated sodium‐ion storage behavior of high‐capacity, high‐rate and long‐life cycling.
Sodium‐ion batteries (SIBs) are receiving considerable attention as economic candidates for large‐scale energy storage applications. Na3V2(PO4)2O2F (NVPF) is intensively regarded as one of the most promising cathode materials for SIBs, due to its high energy density, fast ionic conduction, and robust Na+‐super‐ionic conductor (NASICON) framework. However, poor rate capability ascribed to the intrinsically...
Developing high‐voltage cathode materials is critical for sodium‐ion batteries to boost energy density. NASICON (Na super‐ionic conductor)‐structured NaxMnM(PO4)3 materials (M represents transition metal) have drawn increasing attention due to their features of robust crystal framework, low cost, as well as high voltage based on Mn4+/Mn3+ and Mn3+/Mn2+ redox couples. However, full activation of Mn...
Polyanion‐type phosphate materials are highly promising cathode candidates for next‐generation batteries due to their excellent structural stability during cycling; however, their poor conductivity has impeded their development. Isostructural and multivalent anion substitution combined with carbon coating is proposed to greatly improve the electrochemical properties of phosphate cathode in sodium‐ion...
In article number 1907645, Xing‐Long Wu and co‐workers propose and develop an advanced strategy (isostructural and multivalent anion substitution strategy) to significantly enhance the electrochemical properties of Na‐super‐ionic conductor‐type phosphate cathode (from Na3V2(PO4)3 to Na3.1V2(PO4)2.9(SiO4)0.1) for sodium‐ion batteries. In addition, theoretical calculation and experimental analyses reveal...
As lithium‐ion batteries continue to climb to even higher energy density, they meanwhile cause serious concerns on their stability and reliability during operation. To make sure the electrode materials, particularly cathode materials, are stable upon extended cycles, surface modification becomes indispensable to minimize the undesirable side reaction at the electrolyte–cathode interface, which is...
To further increase the energy and power densities of lithium‐ion batteries (LIBs), monoclinic Li3V2(PO4)3 attracts much attention. However, the intrinsic low electrical conductivity (2.4 × 10−7 S cm−1) and sluggish kinetics become major drawbacks that keep Li3V2(PO4)3 away from meeting its full potential in high rate performance. Recently, significant breakthroughs in electrochemical performance...
In article number 1800567, Xianhong Rui, Chengchao Li, Shaoming Huang, and co‐workers review recent new advances in design and fabrication of nanostructured Li3V2(PO4)3 cathode materials and their enhancement of electrochemical properties. Nanostructured Li3V2(PO4)3 cathodes demonstrate enhanced electrical conductivity, high electrode/electrolyte contact interfaces, favorable electron and Li+ transport...
The development of manganese dioxide as the cathode for aqueous Zn‐ion battery (ZIB) is limited by the rapid capacity fading and material dissolution. Here, a highly reversible aqueous ZIB using graphene scroll‐coated α‐MnO2 as the cathode is proposed. The graphene scroll is uniformly coated on the MnO2 nanowire with an average width of 5 nm, which increases the electrical conductivity of the MnO2...
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