Concise dynamic model to accurately calculate the hydrogen yield during the reaction process

Yang, Liu; Changshi, Liu

doi:10.1016/j.ijhydene.2021.08.007

Cited by 1 publication

(1 citation statement)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In CV tests, the peak width is linked to internal dynamic processes and diffusion rates of reactants within the battery, a narrower one often indicates a faster reaction rate. [34,35] Figure 1c shows the charge and discharge curves obtained using the new charge protocol, in which after the initial activation, the second voltage plateau was limited by restricting the charge voltage to 1.1 V. Consequently, exceptionally flat charge and discharge voltage curves averaging 0.942 and 0.855 V, respectively, can be observed, with a columbic efficiency of >98%. The ultra-flat discharge curve may arise from a singular phase transition mechanism in the Cu electrode reaction (Cu to Cu 2 O), which is consistent with extremely narrow reduction peaks in CV curves, similar phenomena can be also observed in Zn-Ag batteries.…”

Section: Resultsmentioning

confidence: 99%

A Multifaceted Competitive Zn–Cu Battery Unleashed by Optimizing Charge Protocols

Shang,

Ma,

Tan

2024

Adv Funct Materials

View full text Add to dashboard Cite

Rechargeable alkaline Zn–Cu batteries show great potential for energy storage systems due to their high capacity, cost‐effectiveness, and environmental‐friendliness. However, restricted by the severe dissolution upon charging, rapid capacity decline occurs throughout the cycle. Herein, the charging protocol is adjusted to bypass the dissolution stage of high‐valent states, thereby preserving the optimal reaction section of Zn–Cu batteries and greatly improving cycling stability. Additionally, a self‐activation process in the initial stage led to the spontaneous transformation of the original electroplated Cu particles on nickel foam from 10 to 4 mm, enhancing both conductivity and mass transfer, ultimately increasing the utilization of active materials. The battery achieved a discharge capacity of 349.5 mAh g−1, an ultra‐flat charge–discharge voltage platform, over 92% energy efficiency, a low cost of only $43.25 per kWh, and an exceptionally stable cyclic performance with no noticeable decay over 400 cycles. These 5D improvements position the Cu electrode as a robust candidate for the positive electrode material in the next generation of commercial Zn batteries.

show abstract

Section: Resultsmentioning

confidence: 99%