Hummingbird Scientific was the first company to provide a commercially-available holder capable of supporting liquid-electrochemical experiments conducted inside the TEM. In subsequent years, we have continued to refine the holder’s capabilities. In its current configuration, the holder enables electrochemical research via integrated biasing contacts that connect to our specially-patterned electrochemical chips, which are available in a variety of materials. Among other topics, the system has been used for key research into battery materials (see Featured Research below).
The analytical electrochemistry tip features the sample basic capabilities of the standard electrochemistry liquid cell, but it also keeps the electrical contacts outside the experimental space. This option includes an optional low-noise potentiostat and fully shielded cabling for maximum analytical capabilities.
- Standard configuration: In the standard configuration, the system’s wires are not individually shielded. This configuration can connect to Hummingbird’s heater control box as well as a variety of electronic source and measurement devices.
- Low current/noise: For very small current or voltage values, we offer an individually-shielded, low-noise wiring system. In this system, a shielded coaxial cable runs through the holder shaft and connects through special micro-coax connectors in the holder. The system can be configured for compatibility with a range of potentiostats and power supplies. It is particularly well-suited for small-scale in-situ liquid electrochemistry measurements.
Biologic SP-200 potentiostat
We are proud to offer the Biologic SP-200 potentiostat as a research-grade measurement tool for electrochemistry experiments. Hummingbird Scientific’s electrochemistry tip and Biologic’s SP-200 potentiostat can be used in combination for corrosion experiments, electrochemistry, electrolysis, and battery and photovoltaic research.
In-Situ Liquid Nanobattery
Researchers at PNNL, ORNL, UC Davis, Stanford, HIT, and Northwestern University used Hummingbird Scientific’s liquid-electrochemistry TEM holder to explore battery material evolution with cycling. Their research provides insight into degradation mechanisms in battery materials during use, providing a basis for research into new materials for next-generation batteries.
Left: Schematic of a liquid-nanobattery cell used to study the lithiation and delithiation of Si nanowire electrodes.
Right: Time-series images of the lithiation of Cu coated Si nanowires during testing. This experiment employs a configuration that simulates a real battery.
Reference: M. Gu, L.R. Parent, B.L. Mehdi, R.R. Unocic, M.T. McDowell, R.L. Sacci, W. Xu, J.G. Connell, P. Xu, P. Abellan, X. Chen,Y. Zhang, D.E. Perea, J.E. Evans, L.J. Lauhon, J.G. Zhang, J. Liu, N.D. Browning, Y. Cui, I. Arslan, and C.M. Wang. “Demonstration of an Electrochemical Liquid Cell for Operando Transmission Electron Microscopy Observation of the Lithiation/Delithiation Behavior of Si Nanowire Battery Anodes.” Nano Lett. 13:12 (2013) pp. 6106‒6112. Abstract
Copyright © 2013, American Chemical Society