Calcium Based All-Organic Dual-Ion Batteries with Stable Low Temperature Operability

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Secondary batteries face challenges operating at low temperatures.
• Developing stable and efficient low-temperature batteries is crucial for various applications.

Purpose of the Study:

• To fabricate and evaluate an all-organic dual-ion battery (CAN-ODIB) for low-temperature performance.
• To understand the factors influencing the low-temperature electrochemical behavior of the battery.

Main Methods:

• Fabrication of an all-organic dual-ion battery using a calcium perchlorate in acetonitrile electrolyte.
• Electrochemical testing of the battery across a temperature range from 25 °C to -50 °C.
• Impedance analysis at different temperatures to study performance dependency.

Main Results:

• The CAN-ODIB exhibited excellent electrochemical performance from 25 °C down to -50 °C.
• At -50 °C, the battery retained approximately 61% of its capacity compared to 25 °C.
• The battery demonstrated robust cycling stability, retaining 90.3% capacity after 450 cycles at -30 °C.

Conclusions:

• The developed CAN-ODIB shows significant promise for low-temperature energy storage.
• Low-temperature performance is primarily dictated by electrode materials rather than the electrolyte.
• Findings provide guidance for designing future low-temperature secondary batteries.