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高能量密度层状富锂锰基正极材料的改性研究进展 被引量:10
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作者 李雨 赵慧春 +2 位作者 白莹 吴锋 吴川 《储能科学与技术》 CAS CSCD 2018年第3期394-403,共10页
纯电动汽车以及混合动力汽车的快速发展使得研发高能量密度的锂离子电池正极材料迫在眉睫。层状富锂锰基正极材料比容量可达250 mA·h/g,平均放电电压高于3.5 V,电化学特征明显优于钴酸锂和磷酸铁锂等传统的正极材料,是实现300 W... 纯电动汽车以及混合动力汽车的快速发展使得研发高能量密度的锂离子电池正极材料迫在眉睫。层状富锂锰基正极材料比容量可达250 mA·h/g,平均放电电压高于3.5 V,电化学特征明显优于钴酸锂和磷酸铁锂等传统的正极材料,是实现300 W·h/kg动力锂离子电池极具潜力的正极材料。不过,此类材料循环性能不佳,并伴随严重的电压衰退现象,主要原因是随着循环的进行材料表面结构重组,晶体结构发生了由层状结构向尖晶石结构的不可逆转化,导致锂离子迁移阻力增大,进而严重影响其电化学性能。为解决这些问题,近年来研究人员开展了大量工作,本文主要从体相掺杂、表面包覆、材料微观结构设计以及晶面调控4个方面详细评述了锂离子电池富锂锰基正极材料改性技术的研究进展。 展开更多
关键词 富锂锰基正极材料 锂离子电池 改性 电压衰退 循环稳定性
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A Realistic Path to Implementing China's Budget Law
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作者 蒋悟真 zhao huichun 《Social Sciences in China》 2015年第3期56-72,共17页
The core issue for the implementation of modem budget law is to optimize the satisfaction of society's demand for public goods. The form of implementation mechanism that will best achieve this goal has thus become a ... The core issue for the implementation of modem budget law is to optimize the satisfaction of society's demand for public goods. The form of implementation mechanism that will best achieve this goal has thus become a major topic in the field of legal research. To go beyond the Anglo-Saxon budget model and construct a realistic path for the implementation of China's budget law, this issue needs to be explored from the perspective of Chinese citizens in a way that safeguards the fundamental interests of the people and is premised on upholding and improving the People's Congress system, so as to achieve a balance between internal and external budget allocation relationships. There are three routes to implementing China's budget law: the political, the social, and the judicial. Under the first, citizens' political identity interests are represented by deputies who oversee the budgetary powers of administrative bodies through the People's Congress. Under the second, citizens individually or collectively participate, influence or even decide the allocation of public economic resources through dialogue, negotiation, reasoning and argument with the responsible budgetary agency in the course of the budget's compilation, examination and approval, execution and supervision. Under the third, the establishment of a system for budgetary litigation allows citizens to participate in and supervise the implementation of the budget law, individually or collectively. This provides judicial security for the law's implementation. These three realistic implementation routes represent the dialectical unity of concerted institutional effort aimed directly at effective implementation of budget law. Judicial interpretations of budget law implementation indicate the importance and urgency of promoting national governance capacity through reform of the legal systems governing finance and taxation. This explains the significant role of finance and taxation law in national governance. 展开更多
关键词 budget law budget law implementation budgetary rights budget rights allocation budget litigation
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价值是人本身和人的自我完成(英文)
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作者 刘进田 zhao huichun 《中国特色社会主义研究》 CSSCI 北大核心 2013年第S1期82-92,共11页
价值可以区分为价值本身和有价值的事物。价值哲学主要研究价值本身。作为价值本身的价值是人本身和人的自我完成。凡能促进和有利于人本身和人的自我完成的事物是有价值的事物。人本身是指存在和隐于具体的人之中和之上的共性的人和人... 价值可以区分为价值本身和有价值的事物。价值哲学主要研究价值本身。作为价值本身的价值是人本身和人的自我完成。凡能促进和有利于人本身和人的自我完成的事物是有价值的事物。人本身是指存在和隐于具体的人之中和之上的共性的人和人性能力。人本身为每个人所共有又超越于每个人,是确立、鉴照、辨认、修正、更新有价值的事物的根本能力。人的自我完成是指"不是其所是"的人的人性能力的全面而充分的实现。价值在现实生活中是幸福、正义和崇高以及作为德福统一的圆善。 展开更多
关键词 价值 人本身 自我完成 圆善
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