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Pushing the limit of layered transition metal oxide cathodes for high-energy density rechargeable Li ion batteries†
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2018-03-12 00:00:00 , DOI: 10.1039/c8ee00227d U.-H. Kim 1, 2, 3, 4 , D.-W. Jun 1, 2, 3, 4 , K.-J. Park 1, 2, 3, 4 , Q. Zhang 5, 6, 7, 8 , P. Kaghazchi 5, 6, 7, 8, 9 , D. Aurbach 10, 11, 12, 13 , D. T. Major 10, 11, 12, 13 , G. Goobes 10, 11, 12, 13 , M. Dixit 10, 11, 12, 13 , N. Leifer 10, 11, 12, 13 , C. M. Wang 14, 15, 16, 17 , P. Yan 14, 15, 16, 17 , D. Ahn 4, 18, 19, 20 , K.-H. Kim 4, 21, 22, 23 , C. S. Yoon 2, 3, 4, 24 , Y.-K. Sun 1, 2, 3, 4
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2018-03-12 00:00:00 , DOI: 10.1039/c8ee00227d U.-H. Kim 1, 2, 3, 4 , D.-W. Jun 1, 2, 3, 4 , K.-J. Park 1, 2, 3, 4 , Q. Zhang 5, 6, 7, 8 , P. Kaghazchi 5, 6, 7, 8, 9 , D. Aurbach 10, 11, 12, 13 , D. T. Major 10, 11, 12, 13 , G. Goobes 10, 11, 12, 13 , M. Dixit 10, 11, 12, 13 , N. Leifer 10, 11, 12, 13 , C. M. Wang 14, 15, 16, 17 , P. Yan 14, 15, 16, 17 , D. Ahn 4, 18, 19, 20 , K.-H. Kim 4, 21, 22, 23 , C. S. Yoon 2, 3, 4, 24 , Y.-K. Sun 1, 2, 3, 4
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Development of advanced high energy density lithium ion batteries is important for promoting electromobility. Making electric vehicles attractive and competitive compared to conventional automobiles depends on the availability of reliable, safe, high power, and highly energetic batteries whose components are abundant and cost effective. Nickel rich Li[NixCoyMn1−x−y]O2 layered cathode materials (x > 0.5) are of interest because they can provide very high specific capacity without pushing charging potentials to levels that oxidize the electrolyte solutions. However, these cathode materials suffer from stability problems. We discovered that doping these materials with tungsten (1 mol%) remarkably increases their stability due to a partial layered to cubic (rock salt) phase transition. We demonstrate herein highly stable Li ion battery prototypes consisting of tungsten-stabilized Ni rich cathode materials (x > 0.9) with specific capacities >220 mA h g-1. This development can increase the energy density of Li ion batteries more than 30% above the state of the art without compromising durability.
中文翻译：
突破高能量密度可充电锂离子电池分层过渡金属氧化物阴极的极限†
先进的高能量密度锂离子电池的开发对于促进电动汽车很重要。与传统汽车相比，使电动汽车更具吸引力和竞争力取决于其组件丰富且具有成本效益的可靠，安全，高功率和高能量电池的可用性。富镍Li [Ni x Co y Mn 1- x - y ] O 2层状阴极材料（x大于0.5）是令人感兴趣的，因为它们可以提供非常高的比容量，而不会将充电电势推到氧化电解质溶液的水平。但是，这些正极材料存在稳定性问题。我们发现，由于部分分层到立方（岩盐）相变，因此用钨（1摩尔％）掺杂这些材料显着提高了它们的稳定性。我们在本文中演示了高度稳定的锂离子电池原型，该原型由钨稳定的富镍正极材料（x > 0.9）组成，比容量> 220 mA hg -1。这种发展可以使锂离子电池的能量密度比现有技术提高30％以上，而不会影响耐用性。
更新日期：2018-03-12
中文翻译：
突破高能量密度可充电锂离子电池分层过渡金属氧化物阴极的极限†
先进的高能量密度锂离子电池的开发对于促进电动汽车很重要。与传统汽车相比，使电动汽车更具吸引力和竞争力取决于其组件丰富且具有成本效益的可靠，安全，高功率和高能量电池的可用性。富镍Li [Ni x Co y Mn 1- x - y ] O 2层状阴极材料（x大于0.5）是令人感兴趣的，因为它们可以提供非常高的比容量，而不会将充电电势推到氧化电解质溶液的水平。但是，这些正极材料存在稳定性问题。我们发现，由于部分分层到立方（岩盐）相变，因此用钨（1摩尔％）掺杂这些材料显着提高了它们的稳定性。我们在本文中演示了高度稳定的锂离子电池原型，该原型由钨稳定的富镍正极材料（x > 0.9）组成，比容量> 220 mA hg -1。这种发展可以使锂离子电池的能量密度比现有技术提高30％以上，而不会影响耐用性。
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