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    • 6. 发明授权
    • Graphite powder suitable for negative electrode material of lithium ion secondary batteries
    • 石墨粉适用于锂离子二次电池的负极材料
    • US06576369B1
    • 2003-06-10
    • US09138561
    • 1998-08-24
    • Koji MoriguchiMitsuharu YonemuraKazuhito KameiNoriyuki NegiMasaru AbeHideya Kaminaka
    • Koji MoriguchiMitsuharu YonemuraKazuhito KameiNoriyuki NegiMasaru AbeHideya Kaminaka
    • C01B3104
    • H01M4/583C01B32/20C01P2002/60C01P2006/12C01P2006/40H01M4/133H01M4/622H01M4/623H01M6/10H01M10/0525
    • A graphite powder has surface closed-end structures in which the graphite c-plane layers of the graphite layer crystal lattices have closed-ends on the surface of the graphite powder by linking the ends of one or more pairs of the c-plane layers, leaving interstices which are open on the surface of the graphite. The number of open interstices is at least 100 and at most 1500 per micrometer in a c-axis direction of the graphite. Preferably, the graphite powder has a specific surface area of 1.0 m2/g or less. Such a graphite powder can be prepared either by graphitizing a carbon material, which has been pulverized at a high speed under well-controlled conditions before and/or after the carbonization, or by subjecting a carbon material, which has been pulverized under well-controlled conditions before and/or after the carbonization, to graphitization and then to oxidative heat treatment at a temperature of 600-800° C. and finally to heat treatment at a temperature of 800° C. or higher in an inert gas. The graphite powder can be used to produce negative electrodes of lithium ion secondary batteries having a high discharge capacity of at least 320 mAh/g and a high charge/discharge coulombic efficiency of at least 90%.
    • 石墨粉末具有表面封闭端结构,其中石墨层晶格的石墨c面层通过连接一对或多对c面层的端部而在石墨粉末的表面上具有封闭端, 留下在石墨表面开放的间隙。 在石墨的c轴方向上,开口间隙的数量为至少100个,最高为1500微米。 优选石墨粉的比表面积为1.0m 2 / g以下。 这样的石墨粉末可以通过在碳化之前和/或之后在良好控制的条件下高速粉碎的碳材料进行石墨化,或者通过将被粉碎的碳材料进行良好控制 在碳化之前和/或之后的条件进行石墨化,然后在600-800℃的温度下进行氧化热处理,最后在惰性气体中在800℃以上的温度下进行热处理。 该石墨粉末可用于制造具有至少320mAh / g的高放电容量和高充放电库仑效率至少为90%的锂离子二次电池的负极。
    • 8. 发明授权
    • Semiconductor integrated circuit having normal mode and self-refresh mode
    • 具有正常模式和自刷新模式的半导体集成电路
    • US08373499B2
    • 2013-02-12
    • US12844450
    • 2010-07-27
    • Koji MoriguchiToshio Takahashi
    • Koji MoriguchiToshio Takahashi
    • G05F3/02
    • G11C11/40615G11C11/4074G11C2211/4067
    • An SDRAM includes a DC-DC converter IC for generating a first internal power supply voltage from external power supply voltage, a regulator IC for generating a second internal power supply voltage lower than the first internal power supply voltage, from external power supply voltage, and a switching portion for supplying the first internal power supply voltage to an internal circuit in a normal operation mode and supplying the second internal power supply voltage to the internal circuit in a self-refresh mode. The switching unit allows the DC-DC converter IC and the regulator IC to operate simultaneously only for a prescribed overlapped period, at a time of operation mode switching. The DC-DC converter IC temporarily increases the first internal power supply voltage within the operating voltage range of the internal circuit in the overlapped period.
    • SDRAM包括用于从外部电源电压产生第一内部电源电压的DC-DC转换器IC,用于从外部电源电压产生低于第一内部电源电压的第二内部电源电压的调节器IC,以及 开关部分,用于以正常操作模式将第一内部电源电压提供给内部电路,并以自刷新模式将第二内部电源电压提供给内部电路。 开关单元允许DC-DC转换器IC和调节器IC在操作模式切换时同时操作规定的重叠周期。 DC-DC转换器IC在重叠期间临时增加内部电路的工作电压范围内的第一内部电源电压。