Battery Failure in Nanoscale

 


How a battery performs depends on the non-uniformity and failure of individual electrode particles. An understanding of the reaction mechanisms is key to advancing battery research and extending battery lifespan.

 Observations of real-time electrochemical evolutions is very difficult using contemporary methods. They lack spatial resolution and sensitivity. 

Researchers in China from the Institute of Physics of the Chinese Academy of Science are studying nanoscale electrochemical evolutions in batteries. 

Scientists from Suo Liuman’s and Liu Gangquin’s teams have created a quantum sensing approach that is based on diamond nitrogen-vacancy (NV) centers. 

The study was published on September 10th, in a journal called “Device”. The study was titled, “Operando quantum sensing captures the nanoscale electrochemical evolutions in a battery.” 

Scientists found that NV sensors provide spatial resolution from one nanometer to one micron. They are sensitive to variations in temperature, magnetic field and stress. The sensors have significant potential for a real time non-destructive monitoring of battery particles. 

Scientists used an iron oxide electrode to achieve in-situ monitoring of nanoscale active material particles. The study also showed superparamagnetic behavior of the Fe particle.

The huge difference in magnetic field and temperature distribution within the electrode were shown. The difference showed up in many different areas of the research. 

The final results show diamond NV centers can display high resolution characterization of the nanoscale within the electrode. 

The study offers new insight into how batteries fail. 

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