The Nature of Lithium-Ion Transport in Low Power Consumption LiFePO4 Resistive Memory with Graphite as Electrode
The Nature of Lithium-Ion Transport in Low Power Consumption LiFePO4 Resistive Memory with Graphite as Electrode
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以石墨为电极的低功耗 LiFePO4 电阻存储器中锂离子传输的性质
DOI：
10.1002/pssr.201800320
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Liu Yichun
中科院分区：
文献类型：
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作者：
Zhang Lei;Wu Cheng;Liu Jun;Zhao Xiaoning;Wang Zhongqiang;Xu Haiyang;Wang Liancheng;Liu Yichun
碳基材料中电场调制的锂离子迁移在锂离子电池中得到了广泛的报道，这也为离子迁移相关的阻性开关(RS)存储器提供了潜在的应用。受此启发，以Au和石墨片为电极的磷酸铁锂(LiFePO4)RS存储器(Au/LiFePO4/G)被研制成功。通过控制合规电流，该器件可在低功耗(<；30 ？W)下运行。温度相关电阻、飞行时间二次离子质谱仪和拉曼光谱证实了RS机制是由于LiFePO4中锂离子通过石墨电极的插入/提取而引起的与锂浓度相关的可逆电导转换。实验表明，LiFePO4在未来的低功耗非易失性存储器应用中具有潜在的应用价值。
Lithium‐ion migration modulated by electric field in carbon‐based materials has been reported extensively in lithium‐ion batteries, which will also offer potential application in ion‐migration‐related resistive switching (RS) memories. Inspired by this, lithium iron phosphate (LiFePO4)‐based RS memory (Au/LiFePO4/G) is developed with Au and graphite sheet as electrodes. The devices can be operated with a low power consumption (<30 µW) by controlling the compliance currents. The RS mechanism is ascribed to lithium concentration‐related reversible conductivity switching inLiFePO4due to lithium ions insertion/extraction through the graphite electrode as verified by temperature‐dependent resistance, time‐of‐flight secondary ion mass spectrometry, and Raman spectra. As indicated by the experiments, LiFePO4is potentially useful for future low power nonvolatile memory applications.