724
M. Raiford
published [9–13]. However, a deeper look into the changes in morphology and preferred growth planes could yield vital understanding of the most effective PbSO 4
crystal form for dissolution during charge. Dynamic charge acceptance (DCA) must
increase in lead batteries to the point where the electrical system is alternator limited
(approximately 3 kW charge power) [18]. Determining effective ways to improve
DCA has yielded entire families of additives, and lead batteries have demonstrated
large gains in recharge capability (0.2 A/Ah for standard SLI to current advanced
lead batteries possessing 1.5 A/Ah recharge current) [17, 18].
High temperature durability of lead batteries in automotive applications dictates
the longevity of the battery in the field. Lead batteries in mild hybrids must be robust
from −30 to 80 °C [18, 19]. New grid and active materials have increased durability
in this range, with current automotive specification being met by the micro-alloyed
materials [20].
Energy Storage Systems for Grid Services
ESS uses are manifold and are effective assets in many different areas in the electrical
grid. In the past, lead batteries have served in frequency regulation, demand response,
microgrids, and other applications [10, 21, 22].
Lead batteries offer many advantages in ESS systems, mainly good safety, high
reliability, and sustainability [10, 21]. Maximum number of capacity turnovers must
increase for lead batteries to stay competitive in this sector, however, with desired
2500 cycles at 100% depth of discharge (DOD) being required to enter the market.
There are many commercial lead batteries that can attain this performance, with some
exceptional battery products operating in the 5000–6000 cycle range [23].
Fundamental Studies to Improve Lead Battery Performance
In an effort to understand the processes occurring in basic and advanced lead batteries, in situ and in-operando synchrotron X-ray experiments have been utilized to
explore the crystallization/dissolution mechanistic of PbSO 4 , Pb, and PbO 2 phases
[24, 25]. There are severe complications studying lead species using X-rays due to the
high density and poor penetration and interaction volume. Past literature has focused
on compositional analysis after exposure to air and water, as covered by seminal
work by Detchko Pavlov et al. PbSO 4 growth in the negative electrode is accommodated through the transformation of 3PbO · PbSO 4 , 4PbO · PbSO 4 , and PbO.
These relationships serve as the framework for understanding not only the fundamental changes in the phases present in both electrodes, but are used as a fingerprint
for premature failure modes. However, morphological changes that eventually lead
to the concentration of species along the surface and near surface have only been
studied in ex situ samples that have experienced significant phase changes related
M. Raiford
published [9–13]. However, a deeper look into the changes in morphology and preferred growth planes could yield vital understanding of the most effective PbSO 4
crystal form for dissolution during charge. Dynamic charge acceptance (DCA) must
increase in lead batteries to the point where the electrical system is alternator limited
(approximately 3 kW charge power) [18]. Determining effective ways to improve
DCA has yielded entire families of additives, and lead batteries have demonstrated
large gains in recharge capability (0.2 A/Ah for standard SLI to current advanced
lead batteries possessing 1.5 A/Ah recharge current) [17, 18].
High temperature durability of lead batteries in automotive applications dictates
the longevity of the battery in the field. Lead batteries in mild hybrids must be robust
from −30 to 80 °C [18, 19]. New grid and active materials have increased durability
in this range, with current automotive specification being met by the micro-alloyed
materials [20].
Energy Storage Systems for Grid Services
ESS uses are manifold and are effective assets in many different areas in the electrical
grid. In the past, lead batteries have served in frequency regulation, demand response,
microgrids, and other applications [10, 21, 22].
Lead batteries offer many advantages in ESS systems, mainly good safety, high
reliability, and sustainability [10, 21]. Maximum number of capacity turnovers must
increase for lead batteries to stay competitive in this sector, however, with desired
2500 cycles at 100% depth of discharge (DOD) being required to enter the market.
There are many commercial lead batteries that can attain this performance, with some
exceptional battery products operating in the 5000–6000 cycle range [23].
Fundamental Studies to Improve Lead Battery Performance
In an effort to understand the processes occurring in basic and advanced lead batteries, in situ and in-operando synchrotron X-ray experiments have been utilized to
explore the crystallization/dissolution mechanistic of PbSO 4 , Pb, and PbO 2 phases
[24, 25]. There are severe complications studying lead species using X-rays due to the
high density and poor penetration and interaction volume. Past literature has focused
on compositional analysis after exposure to air and water, as covered by seminal
work by Detchko Pavlov et al. PbSO 4 growth in the negative electrode is accommodated through the transformation of 3PbO · PbSO 4 , 4PbO · PbSO 4 , and PbO.
These relationships serve as the framework for understanding not only the fundamental changes in the phases present in both electrodes, but are used as a fingerprint
for premature failure modes. However, morphological changes that eventually lead
to the concentration of species along the surface and near surface have only been
studied in ex situ samples that have experienced significant phase changes related