Battery Characterization via Eddy-Current Imaging with Nitrogen-Vacancy Centers in Diamond
Battery Characterization via Eddy-Current Imaging with Nitrogen-Vacancy Centers in Diamond
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DOI：
10.3390/app11073069
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发表时间：
2021-04-01
影响因子：
2.7
通讯作者：
Budker, Dmitry
中科院分区：
文献类型：
--
作者：
Zhang, Xue;Chatzidrosos, Georgios;Budker, Dmitry
灵敏、准确的磁传感器诊断技术对于利用非侵入性检测技术识别和定位可充电固体电池缺陷具有重要意义。基于51.2mT处的氮空位(NV)中心和单个置换氮(P1)中心之间的交叉弛豫特性，我们提出了一种金刚石中带负电荷NV中心的无微波交流(AC)磁测量方法。我们将这项技术应用于固态电池的非破坏性成像。通过检测电池的涡流感应磁场，我们可以识别外部电极上的缺陷，并识别电池体内的结构异常。空间分辨率达到360微米，在5 kHz的调制频率下，电池产生的最大磁场和相移分别为0.04 mT和0.03 rad。
Sensitive and accurate diagnostic technologies with magnetic sensors are of great importance for identifying and localizing defects of rechargeable solid batteries using noninvasive detection. We demonstrate a microwave-free alternating current (AC) magnetometry method with negatively charged NV centers in diamond based on a cross-relaxation feature between nitrogen-vacancy (NV) centers and individual substitutional nitrogen (P1) centers occurring at 51.2 mT. We apply the technique to non-destructively image solid-state batteries. By detecting the eddy-current-induced magnetic field of the battery, we distinguish a defect on the external electrode and identify structural anomalies within the battery body. The achieved spatial resolution is 360 mu m. The maximum magnetic field and phase shift generated by the battery at the modulation frequency of 5 kHz are estimated as 0.04 mT and 0.03 rad respectively.