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arXiv 2301.04427quant-ph
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利用纳米金刚石中的NV中心对液态电解质电场分布进行量子传感

Quantum sensing of electric field distributions of liquid electrolytes with NV-centers in nanodiamonds

M. Hollendonner, S. Sharma, D. B. R. Dasari, A. Finkler, S. V. Kusminskiy, R. Nagy

AI总结:

本文提出利用纳米金刚石中的单个NV中心,通过微波脉冲序列高精度重建液态电解质内部的电场分布,并揭示了电场标准差与离子浓度的直接关系,实现了局部离子浓度的传感测量。

摘要:

为了将电池用作大规模储能系统,必须\uin-situ和\textit{in-operando}测量并理解其退化过程。由于电池的退化通常是电解质内部分子过程的结果,因此需要一种能够以高空间分辨率测量离子的传感平台。此类平台的主要候选者是金刚石中的NV中心。我们提出使用单个NV中心,通过微波脉冲序列来推断电解质内部离子产生的电场分布。我们展示了通过一种包含自由感应衰减(Free Induction Decay)不同变体以获取平均电场分量,以及使用改进的Hahn-echo脉冲序列来测量电场标准差$σ_E$的协议,可以高精度地重建电场。从半解析方法中,我们发现对于锂离子电池,$σ_E$与离子浓度之间存在直接关系。因此,我们的结果表明,可以使用NV中心作为传感器来测量电解质内部的电场分布和局部离子浓度。

英文摘要:

To use batteries as large-scale energy storage systems it is necessary to measure and understand their degradation \textit{in-situ} and \textit{in-operando}. As a battery's degradation is often the result of molecular processes inside the electrolyte, a sensing platform which allows to measure the ions with a high spatial resolution is needed. Primary candidates for such a platform are NV-centers in diamonds. We propose to use a single NV-center to deduce the electric field distribution generated by the ions inside the electrolyte through microwave pulse sequences. We show that the electric field can be reconstructed with great accuracy by using a protocol which includes different variations of the Free Induction Decay to obtain the mean electric field components and a modified Hahn-echo pulse sequence to measure the electric field's standard deviation $σ_E$. From a semi-analytical ansatz we find that for a lithium ion battery there is a direct relationship between $σ_E$ and the ionic concentration. Our results show that it is therefore possible to use NV-centers as sensors to measure both the electric field distribution and the local ionic concentration inside electrolytes.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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