Capacity Degradation Mechanisms in Nickel/Metal Hydride Batteries

Kim, Young; Yasuoka, Shigekazu

doi:10.3390/batteries2010003

Cited by 59 publications

(48 citation statements)

References 215 publications

(152 reference statements)

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“…(a) Improvements of the battery-electrode materials and formula: formula optimizations of negative electrode and positive electrode, selection of binder and additives, optimization of electrolyte and cell design are effective methods to extend NI-MH cell cycle life [2]. (b) Rational control of charging current: in general, the charging efficiency of battery decreases as the current increases, and the charging and discharging using small current has certain repairing effect on the battery [24].…”

Section: Effective Methods Of Prolonging Battery Lifementioning

confidence: 99%

“…(c) Reasonable control of DoD: in a multi-cell pack, reasonable DoD is very important to improve the cycle life performance. According to the tests in a HEV NI-MH pack, cycle life can be reduced from 5000 cycles to 500 cycles while the DoD is increased from 10% to 90% [2]. Allowing the battery to run in a neutral state with low resistance characteristics can effectively reduce the battery loss and improve the service life.…”

Section: Effective Methods Of Prolonging Battery Lifementioning

confidence: 99%

“…While lithium-ion batteries occupy the leading position in Electric Vehicles (EVs), NI-MH batteries are widely used in powering hybrid electric vehicles (HEV) [1]. The success of NI-MH in powering HEV stems from its superb cycle stability, abuse tolerance, wide temperature range, as well as being environmentally friendly [2].…”

Section: Introductionmentioning

confidence: 99%

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Using SoC Online Correction Method Based on Parameter Identification to Optimize the Operation Range of NI-MH Battery for Electric Boat

et al. 2018

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This paper discusses a design of a Battery Management System (BMS) solution for extending the life of Nickel-Metal Hydride (NI-MH) battery. Combined with application of electric boat, a State of Charge (SoC) optimal operation range control method based on high precision energy metering and online SoC correction is proposed. Firstly, a power metering scheme is introduced to reduce the original energy measurement error. Secondly, by establishing a model based parameter identification method and combining with Extended Kalman Filter (EKF) method, the estimation accuracy of SoC is guaranteed. Finally, SoC optimal operation range control method is presented to make battery running in the optimal range. After two years of operation, the battery managed by proposed method has much better status, compared to batteries that use AH integral method and fixed SoC operating range. Considering the SoC estimation of NI-MH battery is more difficult becausing special electrical characteristics, proposed method also would have a very good reference value for other types of battery management.

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Section: Effective Methods Of Prolonging Battery Lifementioning

confidence: 99%

Section: Effective Methods Of Prolonging Battery Lifementioning

confidence: 99%

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Using SoC Online Correction Method Based on Parameter Identification to Optimize the Operation Range of NI-MH Battery for Electric Boat

et al. 2018

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“…The pristine material shows a granular structure and conglomerates into larger particles with cycling. The growth in size with cycling retards cracking of the particle, due to the lattice expansion from β-Ni(OH) 2 to α-Ni(OH) 2 , which is a common failure mode for capacity degradation in α-Ni(OH) 2 [12,78]. Small amounts of capacity degradation can be seen after 25 cycles due to partial electrode disintegration in the flooded-configuration.…”

Section: Batch Processmentioning

confidence: 99%

“…Future work will be focused on a solution that addresses this electrode swelling. For example, swelling could be alleviated through a coating of CoOOH, Yb(OH) 3 , or both on the spherical particles before electrode fabrication [12].…”

Section: Low-temperature Formationmentioning

confidence: 99%

Fabrications of High-Capacity Alpha-Ni(OH)2

Kim

Wang²,

Yan

et al. 2017

Batteries

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Three different methods were used to produce α-Ni(OH) 2 with higher discharge capacities than the conventional β-Ni(OH) 2 , specifically a batch process of co-precipitation, a continuous process of co-precipitation with a phase transformation step (initial cycling), and an overcharge at low temperature. All three methods can produce α-Ni(OH) 2 or α/β mixed-Ni(OH) 2 with capacities higher than that of conventional β-Ni(OH) 2 and a stable cycle performance. The second method produces a special core-shell β-Ni(OH) 2 /α-Ni(OH) 2 structure with an excellent cycle stability in the flooded half-cell configuration, is innovative and also already mass-production ready. The core-shell structure has been investigated by both scanning and transmission electron microscopies. The shell portion of the particle is composed of α-Ni(OH) 2 nano-crystals embedded in a β-Ni(OH) 2 matrix, which helps to reduce the stress originating from the lattice expansion in the β-α transformation. A review on the research regarding α-Ni(OH) 2 is also included in the paper.

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Recent Advances in Rational Electrode Designs for High‐Performance Alkaline Rechargeable Batteries

Huang

Niu

et al. 2019

Adv Funct Materials

166

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In recent years, noticeable progress is achieved regarding alkaline rechargeable batteries (ARBs). Due to their merits of safety and low cost, ARBs are considered promising energy storage sources for large-scale grid energy storage, electric vehicles, and hybrid electric vehicles, as well as wearable and portable devices. While previous reviews have focused on specific topics associated with ARBs, providing a comprehensive review on rechargeable alkaline batteries is both timely and worthwhile. In this review, the recent progress in ARBs is summarized and the strategies underlying rational electrode designs for cathodes and anodes are highlighted, as well as their applications in full cells including flexible batteries. This review may pave the way for further designs of high-performance alkaline batteries. and a LiMn 2 O 4 cathode in 1994. [10] However, the electrolyzation of H 2 O limits the operating voltage window of ARABs, which are stable within ≈1.23 V. Furthermore, the electrode materials should be selected so that they avoid the electrolysis of H 2 O and maintain chemical stability in H 2 O. [3a] However, the preferred LIB cathodes, such as LiCoO 2 , LiMn 2 O 4 , and LiFePO 4 , which display a reversible capacity of 140, [11] 120, [12] and 170 mAh g −1 , [13] respectively, exhibit narrow working potentials and high stability in aqueous solutions but can take part in one-electron reactions at most. In addition, promising anode materials, such as VO 2 , [14] V 2 O 5 , [15] and H 2 V 3 O 8 , [16] possess the theoretical capacity or show the highest reversible capacity of only 161.6, 200, and 234 mAh g −1 , respectively, [3a] thereby leading to a full cell with a low energy density under the limited operating voltage window in aqueous electrolytes. Although the so-called "water-in-salt" electrolyte and its many variations can enable aqueous batteries with an electrochemical stability window of >3.0 V and an energy density of 200 Wh kg −1 , respectively, the ultrahighly concentrated electrolyte makes the cost too high for practical applications. [17] Since the early 20th century, alkaline rechargeable batteries (ARBs) based on nickel-iron (Ni-Fe) and nickel-cadmium (Ni-Cd) have been established and developed by Jüngner and Edison. [18] These batteries, which use alkaline solution as electrolytes, undergo an entirely different storage mechanism from ARABs and involve H + insertion/extraction and conversion processes from the alkali-metal ion insertion/extraction. Take the reaction mechanism of Ni-Fe batteries as an example

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Capacity Degradation Mechanisms in Nickel/Metal Hydride Batteries

Cited by 59 publications

References 215 publications

Using SoC Online Correction Method Based on Parameter Identification to Optimize the Operation Range of NI-MH Battery for Electric Boat

Using SoC Online Correction Method Based on Parameter Identification to Optimize the Operation Range of NI-MH Battery for Electric Boat

Fabrications of High-Capacity Alpha-Ni(OH)2

Recent Advances in Rational Electrode Designs for High‐Performance Alkaline Rechargeable Batteries

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