Effective CuO/CuS nanospheres heterostructures for advanced "rocking-chair" zinc-ion battery.

Rechargeable aqueous zinc-ion batteries (ZIBs) have attracted considerable attention for energy storage owing to their environmental friendliness and high safety. However, the adverse side reactions and unsatisfactory cycle life brought by Zn-metal anodes limit their large applications. Herein, CuO/CuS (CSO) heterostructured hollow nanospheres is proposed as an attractive conversion-type Zn-metal-free anode for "rocking-chair" ZIBs.

Oxygen Vacancy-Enriched BiSeO Nanosheets with Dual Mechanism for Ammonium-Ion Batteries.

Ammonium ions feature a light molar mass and small hydrated radius, and the interesting interaction between NH and host materials has attracted widespread attention in aqueous energy storage, while few studies focus on high-performance NH storage anodes. Herein, we present a high-performance inset-type anode for aqueous ammonium-ion batteries (AIBs) based on BiSeO nanosheets. A reversible NH/H co-intercalation/deintercalation accompanied by hydrogen bond formation/breaking and a conversion reaction mechanism in layered BiSeO is proposed according to characterizations.

Advanced In Situ Electrochemical Induced Dual-Mechanism Heterointerface toward High-Energy Aqueous Zinc-Ion Batteries.

In situ electrochemical activation brings unexpected electrochemical performance improvements to electrode materials, while the mechanism behind is still needed to study deeply. Herein, an in situ electrochemically approach is developed for the activation of heterointerface MnO /Co O by inducing Mn-defect, wherein the Mn defects are formed through a charge process that converts the MnO with poor electrochemical activities toward Zn into high electrochemically active cathode for aqueous zinc-ion batteries (ZIBs). Guided by the coupling engineering strategy, the heterointerface cathode exhibits an intercalation/conversion dual-mechanism without structural collapse during storage/release of Zn .

A pilot study on lengthening potentials and biomechanical effects of double and triple hemisection on tendon with slide lengthening.

The current study explored the slide-lengthening potentials of double and triple hemisections and the biomechanical effects of different inter-hemisection distances. Forty-eight porcine flexor digitorum profundus tendons were divided into double- and triple-hemisection groups (Groups A and B) and a control group (Group C). Group A was divided into Group A1 (distance between hemisections were the same as Group B) and Group A2 (distance between hemisections corresponded to the greatest distance between hemisections in Group B).

Coupling Engineering of NH Pre-Intercalation and Rich Oxygen Vacancies in Tunnel WO Toward Fast and Stable Rocking Chair Zinc-Ion Battery.

Herein, for the first time, a pre-intercalated non-metal ion (NH ) with rich oxygen vacancies stabilized tunnel WO is proposed as a new intercalation anode to construct Zn-metal-free rocking-chair ZIBs. With the ethylene glycol additive in the aqueous electrolyte, the Zn solvation structure can be regulated and the side reaction of hydrogen evolution can also be suppressed. Owing to the integrated synergetic modification, a high-rate and ultra-stable aqueous Zn-(NH ) WO battery can be constructed, which exhibits an improved specific capacity (153 mAh g at 0.

Battery-type hollow Prussian blue analogues for asymmetric supercapacitors.

Hollow/porous nanomaterials are widely applicable in various fields. The last few years have witnessed increasing interest in the nanoscale Kirkendall effect as a versatile route to fabricate hollow/porous nanostructures. The transformation of Cu-Co Prussian blue analogue (CuCo-PBA) and FeFe-PBA nanocubes into CuO/CoO and FeO nanoframes is based on two types of nanoscale Kirkendall effect, which are related to solid-solid interfacial oxidation and solid-gas interfacial reaction, respectively.

Co@N-CNT/MXenes grown on carbon nanotube film for multifunctional sensors and flexible supercapacitors.

The rapid development of human-machine interfaces and artificial intelligence is dependent on flexible and wearable soft devices such as sensors and energy storage systems. One of the key factors for these devices is the design of a flexible electrode with high sensitivity, fast response time, and a wide working range. Here, we report the fabrication of strain sensors and all-solid-state flexible supercapacitors using Co@N-CNT/MXenes as an electrode material.