Chemistry

Metallurgy

Materials science

Electrochemistry

Physics

Electrode

Energy storage

Anode

Sulfide

Nickel

Endocrinology

Quantum mechanics

Nanotechnology

Organic chemistry

Chemical engineering

Physical chemistry

Medicine

Engineering

Power (physics)

Lithium (medication)

Advanced Energy Materials

Nickel sulfides are regarded as promising anode materials for advanced rechargeable lithium‐ion batteries due to their high theoretical capacity. However, capacity fade arising from significant volume changes during operation greatly limits their practical applications. Herein, confined NiS x @C yolk–shell microboxes are constructed to address volume changes and confine the active material in the internal void space. Having benefited from the yolk–shell structure design, the prepared NiS x @C yolk–shell microboxes display excellent electrochemical performance in lithium‐ion batteries. Particularly, it delivers impressive cycle stability (460 mAh g −1 after 2000 cycles at 1 A g −1 ) and superior rate performance (225 mAh g −1 at 20 A g −1 ). Furthermore, the lithium storage mechanism is ascertained with in situ synchrotron high‐energy X‐ray diffractions and in situ electrochemical impedance spectra. This unique confined yolk–shell structure may open up new strategies to create other advanced electrode material...

Silica Restricting the Sulfur Volatilization of Nickel Sulfide for High‐Performance Lithium‐Ion Batteries