Electrochemical Characterization of Nickel Oxide Anode Materials for Lithium-Ion Batteries

Nickel oxide (NiO) has emerged as a promising alternative to conventional carbonaceous anodes owing to its high theoretical capacity, environmental benignity and cost‐effectiveness. Electrochemical characterisation techniques, including cyclic voltammetry, galvanostatic charge–discharge cycling and electrochemical impedance spectroscopy, have revealed the underlying conversion reaction mechanism in which NiO reversibly transforms into metallic Ni dispersed in Li₂O during lithiation and delithiation. Such conversion offers a theoretical capacity approaching 700 mAh g⁻¹, substantially exceeding that of graphite. However, volumetric changes and the formation of a solid electrolyte interphase (SEI) induce mechanical stress and capacity fading. To mitigate these effects, a rich variety of nanostructures has been explored—among them nanowires, nanobelts, hollow spheres, yolk–shell architectures and composites with conductive carbon matrices. These designs enhance electronic conductivity, shorten Li⁺ diffusion pathways and accommodate strain. Electrochemical impedance spectroscopy studies quantify charge‐transfer resistances, while differential capacity analysis elucidates redox potentials. By integrating morphology control with optimised electrode formulations, researchers have achieved capacities in excess of 800 mAh g⁻¹ at moderate rates, with stable cycling over hundreds of cycles. These advances underscore the global relevance of NiO anodes for electric vehicles and grid storage, offering a pathway towards high‐energy, durable lithium‐ion systems.

Research from Nature Portfolio

Recent studies have demonstrated a template‐free, binderless NiO nanowire foam directly grown on commercially available nickel foam as a high‐performance anode. The porous nanowire array exhibits an exceptionally low equivalent series resistance and delivers a reversible capacity of approximately 680 mAh g⁻¹ at 0.5 C after 1,000 cycles. Remarkably, the foam sustains ultrahigh rate performance—retaining capacities of around 164 mAh g⁻¹ at 20 C and 75 mAh g⁻¹ at 50 C—and recovers its capacity upon return to lower currents. The binderless architecture, synthesized via low‐temperature, biofriendly chemicals without conductive additives or templates, highlights a scalable route to industrial production of robust NiO‐based anodes.

Electrochemical Characterization of Nickel Oxide Anode Materials for Lithium-Ion Batteries publication trend

The graph below shows the total number of articles in electrochemical characterization of nickel oxide anode materials for lithium-ion batteries across all publications each year (not limited to Nature Index journals).

Technical terms

Specific capacity: Charge storage per unit mass of active material, typically expressed in mAh g⁻¹.

Rate capability: Ability of an electrode to retain capacity when subjected to increasing charge–discharge current densities.

Conversion reaction: Electrochemical mechanism in which a metal oxide reversibly converts to its metal and Li₂O during lithiation and delithiation.

Solid electrolyte interphase (SEI): Passivation layer formed on the electrode surface during initial cycling that influences long‐term stability and coulombic efficiency.

Coulombic efficiency: Ratio of discharge capacity to charge capacity in a cycle, indicating the reversibility of electrochemical reactions.

References

1. Template Free and Binderless NiO Nanowire Foam for Li-ion Battery Anodes with Long Cycle Life and Ultrahigh Rate Capability. Scientific Reports (2016).
2. Coral-Like Yolk–Shell-Structured Nickel Oxide/Carbon Composite Microspheres for High-Performance Li-Ion Storage Anodes. Nano-Micro Letters (2019).
3. Hierarchical NiO nanobelt film array as an anode for lithium-ion batteries with enhanced electrochemical performance. RSC Advances (2018).
4. Investigation into electrochemical performance of NiO/graphene composite nanofibers synthesized by a simple method as anode materials for high-performance lithium ion batteries. Materials Research Express (2020).